Proportions Word Problems Flashcard

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set them equal to each other.

Front

What is the scale in a map?

Back

The scale in a map is the ratio of a distance on the map to the actual distance it represents.

Front

If a map has a scale of 1 inch = 5 miles, how do you find the distance on the map for a given distance?

Back

Divide the actual distance by the scale factor (5 miles) to find the distance on the map.

Front

What is the formula for speed?

Back

Speed = Distance / Time.

Front

If a vehicle travels 240 miles in 4 hours, how do you find its speed?

Back

Speed = 240 miles / 4 hours = 60 miles per hour.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

How do you find the number of items needed based on a ratio?

Back

Use the ratio to set up a proportion and solve for the unknown quantity.

Front

If Randy uses 1 carrot for every 2 lumps of coal, how do you find the number of lumps of coal used?

Back

Set up the proportion: 1 carrot / 2 lumps of coal = 22 carrots / x lumps of coal.

Front

What is unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.