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Finding the Fourth Proportional to 418,315.52, 627,571.68 and 137,832.76

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Solution

The fourth proportional to 418,315.52, 627,571.68 and 137,832.76 is: 206,781.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,315.52 : 627,571.68 = 137,832.76 : x
  2. Step 2: Convert to fraction form
    418,315.52/627,571.68 = 137,832.76/x
  3. Step 3: Cross multiply
    418,315.52x = 627,571.68 × 137,832.76
  4. Step 4: Simplify right side
    418,315.52x = 86,499,936,752.24
  5. Step 5: Solve for x
    x = 86,499,936,752.24/418,315.52
  6. Step 6: Final answer
    x = 206,781.56

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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.