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Finding the Fourth Proportional to 538,930.20, 807,876.90 and 418,920.60

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Solution

The fourth proportional to 538,930.20, 807,876.90 and 418,920.60 is: 627,977.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,930.20 : 807,876.90 = 418,920.60 : x
  2. Step 2: Convert to fraction form
    538,930.20/807,876.90 = 418,920.60/x
  3. Step 3: Cross multiply
    538,930.20x = 807,876.90 × 418,920.60
  4. Step 4: Simplify right side
    538,930.20x = 338,436,275,674.14
  5. Step 5: Solve for x
    x = 338,436,275,674.14/538,930.20
  6. Step 6: Final answer
    x = 627,977.94

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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.