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Finding the Fourth Proportional to 279,540.68, 418,960.96 and 220,141.76

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Solution

The fourth proportional to 279,540.68, 418,960.96 and 220,141.76 is: 329,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,540.68 : 418,960.96 = 220,141.76 : x
  2. Step 2: Convert to fraction form
    279,540.68/418,960.96 = 220,141.76/x
  3. Step 3: Cross multiply
    279,540.68x = 418,960.96 × 220,141.76
  4. Step 4: Simplify right side
    279,540.68x = 92,230,803,105.69
  5. Step 5: Solve for x
    x = 92,230,803,105.69/279,540.68
  6. Step 6: Final answer
    x = 329,936.96

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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.