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Finding the Fourth Proportional to 539,129.40, 807,819.30 and 339,091.80

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Solution

The fourth proportional to 539,129.40, 807,819.30 and 339,091.80 is: 508,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,129.40 : 807,819.30 = 339,091.80 : x
  2. Step 2: Convert to fraction form
    539,129.40/807,819.30 = 339,091.80/x
  3. Step 3: Cross multiply
    539,129.40x = 807,819.30 × 339,091.80
  4. Step 4: Simplify right side
    539,129.40x = 273,924,900,511.74
  5. Step 5: Solve for x
    x = 273,924,900,511.74/539,129.40
  6. Step 6: Final answer
    x = 508,087.48

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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.