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Finding the Fourth Proportional to 418,761.59, 627,836.18 and 134,290.21

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Solution

The fourth proportional to 418,761.59, 627,836.18 and 134,290.21 is: 201,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,761.59 : 627,836.18 = 134,290.21 : x
  2. Step 2: Convert to fraction form
    418,761.59/627,836.18 = 134,290.21/x
  3. Step 3: Cross multiply
    418,761.59x = 627,836.18 × 134,290.21
  4. Step 4: Simplify right side
    418,761.59x = 84,312,250,552.48
  5. Step 5: Solve for x
    x = 84,312,250,552.48/418,761.59
  6. Step 6: Final answer
    x = 201,337.12

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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.