This is a series of mathematics lessons that will review the important topics in arithmetics with examples and solutions.

In these lessons, we will learn ratio and proportions, solving proportions and solving word problems using proportions.

These lessons will also be useful as a pre-Algebra review.

The videos are presented by the Portland Community College.

Related Topics:

More Mathematics Lessons.

Previous set of video math lessons in this series.

Next set of video math lessons in this series.

Ratio and Proportion

Solving Proportions

Word Problems (Proportions)

1. A tree of unknown height cast a shadow 26 feet long at the same time and place that a 36 in. yardstick cast a 13 in. shadow. How high is the tree?

2. If a trucker covered 465 miles in 4.2 houre, at the same rate how long will it take to drive 706 miles?

3. A candy shop wishes to mix 100 lbs of nuts to to consists of peanuts and cashews in a ratio of 5 to 2. How much of each is to be used?

4. It is noticed that a 1.5 oz box of spice costs $1.90 whereas a 7.4 oz box costs $9.50. Which is the better buy?

Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.