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Finding the Fourth Proportional to 418,238.02, 627,318.55 and 137,755.27

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Solution

The fourth proportional to 418,238.02, 627,318.55 and 137,755.27 is: 206,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,238.02 : 627,318.55 = 137,755.27 : x
  2. Step 2: Convert to fraction form
    418,238.02/627,318.55 = 137,755.27/x
  3. Step 3: Cross multiply
    418,238.02x = 627,318.55 × 137,755.27
  4. Step 4: Simplify right side
    418,238.02x = 86,416,436,231.26
  5. Step 5: Solve for x
    x = 86,416,436,231.26/418,238.02
  6. Step 6: Final answer
    x = 206,620.23

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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.