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Finding the Fourth Proportional to 498,347.20, 747,520.80 and 478,664.20

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Solution

The fourth proportional to 498,347.20, 747,520.80 and 478,664.20 is: 717,996.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,347.20 : 747,520.80 = 478,664.20 : x
  2. Step 2: Convert to fraction form
    498,347.20/747,520.80 = 478,664.20/x
  3. Step 3: Cross multiply
    498,347.20x = 747,520.80 × 478,664.20
  4. Step 4: Simplify right side
    498,347.20x = 357,811,445,715.36
  5. Step 5: Solve for x
    x = 357,811,445,715.36/498,347.20
  6. Step 6: Final answer
    x = 717,996.30

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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.