The relationship between the 3's in the number 9, 338 is their position with each other and the arrangement in values.
In the expanded form of the number:
9, 000 + 300 + 30 + 8 = 9, 338
300 = hundreds 30 = tens
We can presume that
1. 300 is much larger than 30 because of the position in which 300 is hundreds > 30 is thirty in value.