This lesson teaches how to solve word problems using proportions by setting up a proportion equation and cross-multiplying. The example problem involves determining the distance between two cities in miles given their distance on a map in inches. The lesson also covers the concept of similar triangles and how they are proportional to each other. The instructor provides an example problem of finding the length of a missing side of a triangle using proportions.
Shows how to solve word problems by writing a proportion and solving.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com