Solution:Let's solve for X
(35 x 48 x 675) / (315 x 45) = (X x 1224) / 30.6
(35 x 48 x 675 x 30.6) = (X x 1224 x 315 x 45)
X = (35 x 48 x 675 x 30.6) / (1224 x 315 x 45)
X = (35 x 48 x 15 x 30.6) / (1224 x 315)
X = (35 x 16 x 30.6) / (1224 x 7)
X = (5 x 16 x 30.6) / (1224)
X = (5 x 2 x 30.6) / 153
X = (10 x 30.6) / 153
X = 306 / 153
X = 2