甲仓库 X 乙仓库 Y
3/4* X+1/4*（Y+1/4*X)=3/4*(Y+1/4*X)
3/4* X=2/4*(Y+1/4*X)
3* X=2*Y+2/4*X
5*X=4*Y
X/Y=4/5
甲仓库的粮食是乙仓库的5分之4.