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Finding the Fourth Proportional to 502,464.80, 753,697.20 and 128,487.80

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Solution

The fourth proportional to 502,464.80, 753,697.20 and 128,487.80 is: 192,731.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,464.80 : 753,697.20 = 128,487.80 : x
  2. Step 2: Convert to fraction form
    502,464.80/753,697.20 = 128,487.80/x
  3. Step 3: Cross multiply
    502,464.80x = 753,697.20 × 128,487.80
  4. Step 4: Simplify right side
    502,464.80x = 96,840,895,094.16
  5. Step 5: Solve for x
    x = 96,840,895,094.16/502,464.80
  6. Step 6: Final answer
    x = 192,731.70

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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.