Problem

Solve the problem. (Assume that all items are equally priced.) See Example.EXAMPLE Applyin...

Solve the problem. (Assume that all items are equally priced.) See Example.

EXAMPLE Applying Proportions

After Lee Ann Spahr had pumped 5.0 gal of gasoline, the display showing the price read $16.60. When she finished pumping the gasoline, the price display read $48.14. How many gallons did she pump?

To solve this problem, set up a proportion, with prices in the numerators and gallons in the denominators. Let x = the number of gallons she pumped.

She pumped 14.5 gal. Check this answer. (Using a calculator reduces the possibility of error.) Notice that the way the proportion was set up uses the fact that the unit price is the same, no matter how many gallons are purchased.

The distance between Kansas City, Missouri, and Denver is 600 mi. On a certain wall map, this is represented by a length of 2.4 ft. On the map, how many feet would there be between Memphis and Philadelphia, two cities that are actually 1000 mi apart?

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