Question

The length of a cell phone is 1, point, 21.2 inches and the width is 3, point, 43.4 inches. The company making the cell phone wants to make a new version whose length will be 1, point, 1, 41.14 inches. Assuming the side lengths in the new phone are proportional to the old phone, what will be the width of the new phone?

Answer 1

I can't reliably parse the numbers as written (e.g. "1, point, 21.2"). Could you rewrite the three measurements using normal decimal notation (for example "5.21 inches", "3.43 inches", "4.114 inches")?

For reference, if the old length is L and old width is W, and the new length is L', then the new width W' (keeping proportions) is

W' = W * (L' / L).

Once you give the three numbers in standard decimal form I will compute W' for you.