a + b + c + d = 637;
a - a/13 = b - 3b/13 = c -3c/13 = d - 5d/13;
a - a/13 = d - 5d/13; 13a - a = 13d - 5d, 12a = 8d; a = 8d/12;
a = 2d/3;
b - 3b/13 = d - 5d/13; 13b - 3b = 13d - 5d=>10b = 8d;b = 8d/10
b = 4d/5
c - 3c/13 = d - 5d/13; 13c - 3c = 13d - 5d=> 10c = 8d
c = 4d/5
2d/3 + 4d/5 + 4d/5 + d = 637
2d/3 + 8d/5 + d = 637
10d + 24d + 15d = 637x15
49d = 637x15
d = 13x15=>d = 195 cm;
c = 195x4/5=>c = 156 cm;
b = 4x195/4=>b = 156 cm;
a = 2x195/3=>a = 130 cm.