Given: PQ : QR : RP = FG : GH : HF
3 : x + 3 : 2 = 6 : 6x + 2 : 4
So: (x + 3) : (6x + 2) = 2 : 4 (you could use 3 : 6; it doesn't matter)
(x + 3) / (6x + 2) = 2 / 4
4(x + 3) = 2(6x + 2) (cross multiply)
4x + 12 = 12x + 4
8 = 8x
1 = x
Find QR = x + 3 = 1 + 3 = 4
