The instructor uses a white board to demonstrate 3 ways to solve proportions. The three methods used are multiplying up and down by the same multiple, multiplying across by the same multiple, or by using cross multiplication.

In order to make solving proportions with mixed numbers easier, simply turn the mixed number into an improper fraction. Solve proportions with mixed numbers by using cross multiplication. The instructor uses a document camera for demonstration.

This Excellent video from Jimmy Chang, who has a master's degree in math and has been a math teacher at St. Pete College for more than eight years. This video explains what means and extremes are in the context of proportions. It defines each term ...and shows how to solve a simple proportion problem.[more]

How can you tell if two ratios are equal to each other? Watch this video and learn how. This video by Duane Habecker is part of the video collection at NextVista.org (http://nextvista.org), a proud partner of Curriki.

From YouTube, produced by freemathtutoring.goglepages.com

The instructor discusses the fundamental rule of proportions and all proportions are solved using this rule. Several examples are presented on a white board using a step by step approach. For Exercise and Answer sheets, go to: http://freemathtutorin...g.googlepages.com[more]

In this video, the instructor, using a white board, show how to do two word problems involving proportions. This video is for upper elementary students and older. run time 3:14

In this video, a teacher explains percentages and proportion using a "real-life" example of calculating a tip on a restaurant bill. The teacher demonstrates calculating 15% of 30 using a proportion. ( 2:33)

In this video, a teacher demonstrates solving proportiona using vertical and horizontal relationships and cross-products. The problems are worked on a white board as the teacher explains each step. ( 2:33)

In this video students learn that a proportion is an equation that states that two ratios are equal. Students then learn the properties of proportion, and are asked to solve for x in given proportions, and to solve word problems involving proportions.... Examples of solving proportions are made with marker on a white board.
Run time 2:56[more]

Instructor uses and electronic chalkboard to demonstrate how to solve proportions. Examples show how to solve using mental math and looking for a pattern with emphasis on using cross multiplication.

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