Finding the Fourth Proportional to 518,696,915.12, 715,799,602.73 and 280,542,365.49
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Solution
The fourth proportional to 518,696,915.12, 715,799,602.73 and 280,542,365.49 is: 387,147,306.87
Step by Step Solution
- Step 1: Write the proportion equation
518,696,915.12 : 715,799,602.73 = 280,542,365.49 : x - Step 2: Convert to fraction form
518,696,915.12/715,799,602.73 = 280,542,365.49/x - Step 3: Cross multiply
518,696,915.12x = 715,799,602.73 × 280,542,365.49 - Step 4: Simplify right side
518,696,915.12x = 200,812,113,770,062,048 - Step 5: Solve for x
x = 200,812,113,770,062,048/518,696,915.12 - Step 6: Final answer
x = 387,147,306.87
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.