3.62 is the number, because 4 divided by 3 is 1.33333... So you take 4.82 and divide it by 1.333... and you'll get 3.615, and then you round the number to the nearest hundredths. which will get you, 3.62.
It would be the 1st one ( 12in× 1in/2.5ft) the reason is you want the measurements to match so that way when you solve the equation you are multiply 12 by 2.5 to get the number of inches
