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Finding the Fourth Proportional to 418,351.91, 627,572.43 and 133,940.75

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Solution

The fourth proportional to 418,351.91, 627,572.43 and 133,940.75 is: 200,925.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,351.91 : 627,572.43 = 133,940.75 : x
  2. Step 2: Convert to fraction form
    418,351.91/627,572.43 = 133,940.75/x
  3. Step 3: Cross multiply
    418,351.91x = 627,572.43 × 133,940.75
  4. Step 4: Simplify right side
    418,351.91x = 84,057,518,815.66
  5. Step 5: Solve for x
    x = 84,057,518,815.66/418,351.91
  6. Step 6: Final answer
    x = 200,925.39

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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.