Math TV
Math tv.com: Basic Mathematics: Solving Proportions
A math teacher and several students offer step-by-step solutions to questions involving proportions. Questions include, "In the proportion 3/4 = 6/8, name the four terms, the means, and the extremes" and "Solve for x: 2/3 = 4/x". In the...
Math Mammoth
Math Mammoth: What Is a Proportion? Three Ways to Solve Proportions
Explains what proportions are and three ways to solve them. [5:49]
Math Mammoth
Math Mammoth: Proportion Word Problems: Pre Algebra Lesson
Demonstrates how to solve three word problems using ratios and proportions. [5:55]
Khan Academy
Khan Academy: Ratios With Algebra: More Advanced Ratio Problem With Algebra
A step-by-step instructional video on how to solve a ratio problem.
Khan Academy
Khan Academy: Ratios With Algebra: Advanced Ratio Problems
The video tutorial explores advanced ratio problems.
Khan Academy
Khan Academy: Ratios and Proportions: Ratio and Proportion
This video solves a problem involving ratio and proportions.
Virtual Nerd
Virtual Nerd: How Do You Solve a Word Problem Using Ratios?
Take a look at this tutorial to see how to use a ratio to create equivalent ratios. [4:34]
Virtual Nerd
Virtual Nerd: What's a Proportion?
Watch this tutorial to learn why proportions are actually equations with equal ratios. [3:45]
Khan Academy
Khan Academy: Graphing Proportional Relationships From an Equation
Video lesson shows how to graph the equation of a line that represents a proportional relationship given an equation. [3:08]
Khan Academy
Khan Academy: Ratios With Algebra: Find an Unknown in a Proportion
Video demonstrates how to find an unknown in a proportion three different ways..
Khan Academy
Khan Academy: Algebra: Ratio Problem With Basic Algebra
The algebra resource demonstrates how to solve ratio problems. Students learn about the concept through a video tutorial. [5:12]
Khan Academy
Khan Academy: Ratios With Algebra: Ratio Problem With Basic Algebra
A step-by-step breakdown on how to solve ratio problems with algebra.
Khan Academy
Khan Academy: Ratios and Proportions: Understanding Proportions
This video shows how to determine if a given proportion is true or false.
Math Mammoth
Math Mammoth: Proportional Relationships / Direct Variation
This lesson explains several ways to determine if variables are in a proportional relationship. An example of a non-proportional relationship is given and inverse variation and direct variation are discussed. [11:55]
Other
Algebra2go: Solving Proportions
Professor Perez's virtual classroom provides examples that demonstrate how to solve proportion problems. [7:18]
Art of Problem Solving
Art of Problem Solving: Proportion
Video tutorial uses examples to reinforce understanding of proportions. [7:09]
Loyola University Chicago
Math Flix: Using Proportion
This QuickTime movie gives examples of how to use the concept of proportion. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Proportion Introduction
This QuickTime movie introduces the concept of proportion. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.
PBS
Pbs Learning Media: Scale City: Similar Figures in the Real World
This video features the Louisville Slugger Museum and Factory, home to the world's largest bat. Students see the role that measurement and engineering play in making bats to professional players' specifications and are asked to consider...
Art of Problem Solving
Art of Problem Solving: Multi Part Ratios
An introduction to multi-part ratios. [5:25]
Sophia Learning
Sophia: Equivalent Ratios: Lesson 1
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 1 of 8 in the series titled "Equivalent Ratios."
Sophia Learning
Sophia: Solving Algebraic Problems Using Fractions and Decimals
Solve algebraic problems arising from situations that involve fractions, decimals, and proportionality/direct variation. This lesson is 2 of 2 in the series titled "Solving Algebraic Problems using Fractions, Decimals, and Proportionality."