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Practical Problem: Gas and Oil Mixture
01:44

Practical Problem: Gas and Oil Mixture

A a two-cycle engine runs on a mixture of oil and gas. A practical problem involves determining how many ounces of oil to add to a gallon of gas to get the right mixture. The problem is solving with proportion.

Solving a Proportion Problem
01:23

Solving a Proportion Problem

The number of bags of seed needed to cover a particular area, given the area one bag will cover, is calculated using a proportion.

Variation Problems
03:36

Variation Problems

A variation problem always involves two sets of information and two formulas. To solve a variation problem, a general formula is written from the variation statement. A specific formula can then be written with the constant of variation.

Using Proportion to Find Real Lengths from Scale Lengths
03:30

Using Proportion to Find Real Lengths from Scale Lengths

A specific formula is developed to solve a practical problem of converting scale length to real length in a scale drawing.