Proportions
Ratios and Rates
Vocabulary
Scale Factors
Scale Models
100
Does the pair of ratios form a proportion: 1.5/5.0 = 3 / 9?
What is no?
100
Express in simplest form: $3 for 6 cans of beans.
What is $1 for 2 cans of beans?
100
Ratio
What is a comparison of two numbers by division?
100
The scale factor of 1 inch to 4 feet.
What is 1 to 48?
100
The scale of a picture to an actual building is 1 in = 3 ft. How tall is the building if the drawing is 24 inches tall?
What is 72 feet?
200
Solve: 16 / 7 = 4.8 / x
What is 2.1?
200
Express as a unit rate: 75 meters in 15 seconds.
What is 5 meters per second?
200
Unit Rate
What is a rate that is simplified so that it has a denominator of 1?
200
Scale factor of 8 inches to 40 feet.
What is 1 to 60?
200
The scale of a drawing of a garden is 1/4 in = 2 feet. The garden is 8 feet wide. How wide is the drawing?
What is 1 inch?
300
Solve: 3 / x = 12 / 6
What is x = 1.5?
300

Convert using dimensional analysis: 5 C / min = ? qt / hr. (4 cups per quart)

What is 75 qt per hr?

300
Proportion
What is a statement of equality of two ratios?
300
Scale Factor of 1/2 inch to 3 feet.
What is 1 to 72?
300
If a scale has a scale factor of 1/18, which could be the correct scale? a) 3 in = 6 ft; b) 6 in = 9 ft; c) 3 in = 54 ft; d) 6 in = 6 ft.
What is b) 6 in = 9 ft?
400
Use a proportion to solve: 12 pencils for $4, 144 pencils for $x.
What is $48?
400

Express in simplest form: 4.5 apples to 10 oranges.

What is 9 / 20?

400
Scale Drawing or Scale Model
What is a drawing or model that is used to represent an object that is too large or too small to be drawn or built at actual size?
400
The scale factor of a model is 2 to 3. The scale is 8 inches = ?? feet?
What is 1?
400
On a scale model, the highest point is 6 inches tall. If the actual height of that point is 210 feet, what is the scale of the model?
What is 1 in = 35 feet?
500
Solve: 6.5 / 1.3 = m / 5.2.
What is 26?
500

Express as a unit rate: 331.5 pages in 8.5 weeks.

What is 39 pages per week?

500
Scale
What is a ratio that gives the relationship between the measurements on the drawing or model and the measurements of the real object?
500
The scale factor of 5 cm = 2 m.
What is 1 to 40?
500

A model is built with a 1:16 scale. On the model, the width is 5.8 feet. What is the actual width?

What is 92.8 ft?

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