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Finding the Fourth Proportional to 657,847.20, 987,159.60 and 479,906.40

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Solution

The fourth proportional to 657,847.20, 987,159.60 and 479,906.40 is: 720,143.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,847.20 : 987,159.60 = 479,906.40 : x
  2. Step 2: Convert to fraction form
    657,847.20/987,159.60 = 479,906.40/x
  3. Step 3: Cross multiply
    657,847.20x = 987,159.60 × 479,906.40
  4. Step 4: Simplify right side
    657,847.20x = 473,744,209,861.44
  5. Step 5: Solve for x
    x = 473,744,209,861.44/657,847.20
  6. Step 6: Final answer
    x = 720,143.23

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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.