Question

Identify the missing side length using a scale factor of 1.5.

Answer 1

7.5

Explanation:

The width on the left rectangle is 3

Multiply it by the scale factor (1.5) and we get the width of the rectangle on the right

3 * 1.5 = 4.5

Then take the length of the rectangle on the left and multiply it by the scale factor

5 (1.5) = 7.5

The length of the rectangle is 7.5

Answer 2

7.5

Explanation:

You really don't have to. Set up a Proportion.

3/4.5 = 5/x Cross multiply

3*x = 4.5 * 5 Combine the right

3x = 22.5 Divide by 3

3x/3 = 22.5/3 Do the division

x = 7.5

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However, you could use a scale factor of 1.5

The parent shape has a length of 5

This is multiplied by 1.5

New length = Old length * Scale factor.

New length = ????

Old length = 5

Scale factor = 1.5

New length = 1.5 * 5 = 7.5