SOLUTION: In an old algebra book the section on ratio: a movie projector uses 8 mm film. The images projected on a screen has the enlargement ratio of 1 to 190 with no blurring or distortio

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Question 1071799: In an old algebra book the section on ratio: a movie projector uses 8 mm film. The images projected on a screen has the enlargement ratio of 1 to 190 with no blurring or distortion. The original negative is 8 mm wide, and projected image is 8 * 190, or 1520 mm.
They are saying the ratio is 8 mm. to 5 ft.
In the same section, 6 inches to 2 feet; the 2 ft. has to be changed to 24 in. to get the ration 6 to 24.
My question: How can the 8 mm. be compared to 5 ft.? Definition in the section; Ratio represents quantities of the same kind and are measured in the same units.
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
8%2Amm%2A190=1520mm 
Use these conversion factors to change the millimeters into feet.

10 mm = 1 cm
1 inch = 2.54 cm
12 inches = 1 foot




about 4.987 feet