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Finding the Fourth Proportional to 657,988.60, 987,213.30 and 284,279.80

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Solution

The fourth proportional to 657,988.60, 987,213.30 and 284,279.80 is: 426,519.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,988.60 : 987,213.30 = 284,279.80 : x
  2. Step 2: Convert to fraction form
    657,988.60/987,213.30 = 284,279.80/x
  3. Step 3: Cross multiply
    657,988.60x = 987,213.30 × 284,279.80
  4. Step 4: Simplify right side
    657,988.60x = 280,644,799,481.34
  5. Step 5: Solve for x
    x = 280,644,799,481.34/657,988.60
  6. Step 6: Final answer
    x = 426,519.24

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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.