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Finding the Fourth Proportional to 418,620.32, 627,952.20 and 138,159.44

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Solution

The fourth proportional to 418,620.32, 627,952.20 and 138,159.44 is: 207,246.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,620.32 : 627,952.20 = 138,159.44 : x
  2. Step 2: Convert to fraction form
    418,620.32/627,952.20 = 138,159.44/x
  3. Step 3: Cross multiply
    418,620.32x = 627,952.20 × 138,159.44
  4. Step 4: Simplify right side
    418,620.32x = 86,757,524,298.77
  5. Step 5: Solve for x
    x = 86,757,524,298.77/418,620.32
  6. Step 6: Final answer
    x = 207,246.33

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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.