Finding the Fourth Proportional to 386,307.20, 579,460.80 and 339,612.80
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Solution
The fourth proportional to 386,307.20, 579,460.80 and 339,612.80 is: 509,419.20
Step by Step Solution
- Step 1: Write the proportion equation
386,307.20 : 579,460.80 = 339,612.80 : x - Step 2: Convert to fraction form
386,307.20/579,460.80 = 339,612.80/x - Step 3: Cross multiply
386,307.20x = 579,460.80 × 339,612.80 - Step 4: Simplify right side
386,307.20x = 196,792,304,778.24 - Step 5: Solve for x
x = 196,792,304,778.24/386,307.20 - Step 6: Final answer
x = 509,419.20
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.