Deck 31: Proportions

Question 1

Solve the proportion for the unknown term ( x ): 64:8 = x :16 .

Answer 1

128

Question 2

The diameter of a driving pulley is 12.75 inches. The pulley is rotating at 225 rpm. The driving pulley is rotating at 450 rpm. Determine the diameter in inches of the driver pulley.

Answer 2

25.5 inches

Question 3

Solve the proportion for the unknown term ( x ): 350/7 = 150/ x.

Answer 3

3

Question 4

On method for solving proportions is to set up the two ratios as equal fractions and then cross multiplying.

Question 5

In two weeks, 3 machinists assemble 30 machines. How many machinists are needed to assemble 100 machines in the same times?

Question 6

Solve the proportion for the unknown term ( x ): 18.9/5.4 = 21/ x .

Question 7

Solve the proportion for the unknown term ( x ): 3.5:1= x :14 .

Question 8

In a proportion, the extremes are the two inside terms.

Question 9

A CAD operator realizes that it takes 36 minutes to plot a drawing. How long in hours will it take to plot 30 hard copies of the same drawing?

Question 10

A gear with 24 teeth and running at 120 rpm is being driven by a gear turning at 360 rpm. How many teeth does the driving gear have?