I need help solving it by the rule of three #Chemistry

Question

Rust contains an iron-oxygen compound in which there are three oxygen atoms for each two iron atoms. In this compound, the iron to oxygen mass ratio is 2.325:1. Another compound of iron and oxygen contains these elements in the ratio of 2.616:1. What is the ratio of iron to oxygen atoms in the second iron-oxygen compound?

Answer 1

Law of Multiple Proportions

Initial compound = Fe2O3

2.616 / 2.325 = 1.125 x 8 = 9

So we'd have Fe₁₈O₂₇

Not sure this is an actual compound, but if the calculations are correct, this is what we'd have.