1. Let's understand what ratios represent. A ratio compares quantities, showing their relative sizes. 2. The ratio 3:4:9 means the first quantity is 3 parts, the second is 4 parts, and the third is 9 parts. 3. The ratio 4:9:3 means the first quantity is 4 parts, the second is 9 parts, and the third is 3 parts. 4. Changing the order of numbers in a ratio changes the meaning because each position corresponds to a specific quantity. 5. Therefore, 4:9:3 is not the same as 3:4:9; they represent different relationships. 6. If you want to express the same ratio but in a different order, you must also reorder the quantities accordingly. 7. In summary, putting 4:9:3 instead of 3:4:9 is wrong if you intend to represent the same relationship between the three quantities.