posted on May, 28 2016 @ 03:18 AM
a reply to:
errorcode
For example, im looking at bicycle image. I know that the top tube is 570mm long so by plotting that measument could there be an app that works out
the other measurements? X = 570 So Y = ?
This is a ratio and proportion problem of the form
"example X" is to "example Y" as R is to 100, solving for R
and then
"Your X" is to the "desired Y" as the Ratio(now known) is to 100, solving for Y
so, first solve to find R, the Ratio.
In the original image you need the 2 tubes that they show as a baseline and plug in those numbers.
Formula:
first, find the ratio of x to y in their model
eX R
--- ---
eY 100
Cross multiply example x with 100 and divide example y
into that number. This gives you the ratio (R)
same exercise now, substitution R and solving for Y
570 R
---- ---
Y 100
Cross multiply your X (570) with 100 and divide the Ratio ( R )
into that number, solving for Y
This gives you the Y value you want to use.
edit on 28-5-2016 by charlyv because: (no reason given)