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Finding the Fourth Proportional to 418,397.28, 627,581.34 and 134,083.64

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Solution

The fourth proportional to 418,397.28, 627,581.34 and 134,083.64 is: 201,120.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,397.28 : 627,581.34 = 134,083.64 : x
  2. Step 2: Convert to fraction form
    418,397.28/627,581.34 = 134,083.64/x
  3. Step 3: Cross multiply
    418,397.28x = 627,581.34 × 134,083.64
  4. Step 4: Simplify right side
    418,397.28x = 84,148,387,325.37
  5. Step 5: Solve for x
    x = 84,148,387,325.37/418,397.28
  6. Step 6: Final answer
    x = 201,120.78

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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.