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Finding the Fourth Proportional to 279,260.71, 418,891.07 and 129,481.28

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Solution

The fourth proportional to 279,260.71, 418,891.07 and 129,481.28 is: 194,221.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,260.71 : 418,891.07 = 129,481.28 : x
  2. Step 2: Convert to fraction form
    279,260.71/418,891.07 = 129,481.28/x
  3. Step 3: Cross multiply
    279,260.71x = 418,891.07 × 129,481.28
  4. Step 4: Simplify right side
    279,260.71x = 54,238,551,924.17
  5. Step 5: Solve for x
    x = 54,238,551,924.17/279,260.71
  6. Step 6: Final answer
    x = 194,221.92

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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.