Formula : d/D = m/M (d=distance cg moves , D= distance between holds , m=mass to be moved , M=total mass)

We need to find 'd' so we need to calculate little 'm' divide by big 'M' multiply by distance between holds , therefore:

390 divide by 116500 x 507 = 1.697

435 - 1.697 = 433.3