Aconstruction company painted an apartment complex brown and white using a total of 904 gallons of paint. they used 591 gallons of brown paint. the construction manager calculates that they used 413 gallons of white paint. is the manager's calculation reasonable? estimate the number of gallons of white paint by rounding the numbers to check the manager's calculation.

they used 313 gallons of paint

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional