What is 1600 square yards ratio 3:5

I believe that if you were trying to find the ratio that adds up to square ratio then you put it in terms of x

3x+5x=1600

8x=1600 and then you divide by 8

x=200

then you plug it in

3x=3 (200) = 600

5x=5 (200) = 1000

600:1000 is your final answer in sq yards