This video shows how to determine if a given proportion is true or false.

Indirect measurement using shadows and proportions is explored in this video lesson. The tutorial includes a very detailed example of the concept.

This video lesson describes how ratios are related to rates and proportions. Students can check their understanding with an assessment.

This video lesson demonstrates how to use ratio reasoning to solve real-world math problems. The tutorial includes detailed examples.

This video lesson demonstrates how to solve proportions with an unknown variable. The tutorial includes detailed examples.

Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site, students learn about proportional relationships.

In this lesson, you will learn to identify scale factors by exploring the side lengths of rectangles. [4:52]

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.

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.

This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by checking to see if figures are proportionaly similar. As you watch and listen to the teacher and student interact it helps clarify the thinking...

Graphs of linear relationships are basically just lines and dots. In this video, you will learn the skills to understand and analyze the graphs to get useful information from them. [1:29]

This lesson is about solving real world problems that involve a combination of rates, proportions and percents. Also, it is aligned to a common core state standard CC.9-12.N.Q.2. [10:59]

When you are asked to make an object bigger or smaller, you will ask, "by how much?". In this case, scale factor can help answer the question. In this lesson, we will practice how to enlarge and reduce objects according to the scale...

Use what you know about percents, ratios, and proportions to figure out the sale price in this real world application of math. See if you can figure out how they calculated the correct price for the shoes Carla likes. Combining percents...

Doubling something isn't always easy! See if you can figure out why if Tito sells his new pizza for $19.99 he'll be in trouble. Use what you know about area, rates, and proportions to figure out how much Tito should charge or what the...

This lesson demonstrates how to solve a proportion when a variable is present. It is 11 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 13 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 2 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 4 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 5 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 7 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 9 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson demonstrates how to solve a proportion when a variable is present. It is 1 of 13 in the series titled "Solving a Proportion with an Unknown."

This lesson explains how proportional relationships can be described using equations.