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Finding the Fourth Proportional to 249.56, 344.40 and 139.04

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Solution

The fourth proportional to 249.56, 344.40 and 139.04 is: 191.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.56 : 344.40 = 139.04 : x
  2. Step 2: Convert to fraction form
    249.56/344.40 = 139.04/x
  3. Step 3: Cross multiply
    249.56x = 344.40 × 139.04
  4. Step 4: Simplify right side
    249.56x = 47,885.38
  5. Step 5: Solve for x
    x = 47,885.38/249.56
  6. Step 6: Final answer
    x = 191.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.