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Finding the Fourth Proportional to 502,403.80, 755,355.30 and 425,421.40

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Solution

The fourth proportional to 502,403.80, 755,355.30 and 425,421.40 is: 639,613.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,403.80 : 755,355.30 = 425,421.40 : x
  2. Step 2: Convert to fraction form
    502,403.80/755,355.30 = 425,421.40/x
  3. Step 3: Cross multiply
    502,403.80x = 755,355.30 × 425,421.40
  4. Step 4: Simplify right side
    502,403.80x = 321,344,309,223.42
  5. Step 5: Solve for x
    x = 321,344,309,223.42/502,403.80
  6. Step 6: Final answer
    x = 639,613.61

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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.