Answer
0.4297/0.2865=1.5:1=3:2 is a ratio of small whole numbers so the data is consistent.
Work Step by Step
Remember: The law of multiple proportions states when two elements combine in more than one proportion to form two or more compounds the weights of one element that combine with a given weight of the other element are in the ratios of small whole numbers.
We must solve using the given ratios of FeO and Fe2O3.
$Fe_{2}O_{3}/FeO \\
0.4297/0.2865=1.5:1=3:2$
This is a ratio of small whole numbers so the data is consistent.
