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Finding the Fourth Proportional to 249.59, 344.43 and 139.09

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Solution

The fourth proportional to 249.59, 344.43 and 139.09 is: 191.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.59 : 344.43 = 139.09 : x
  2. Step 2: Convert to fraction form
    249.59/344.43 = 139.09/x
  3. Step 3: Cross multiply
    249.59x = 344.43 × 139.09
  4. Step 4: Simplify right side
    249.59x = 47,906.77
  5. Step 5: Solve for x
    x = 47,906.77/249.59
  6. Step 6: Final answer
    x = 191.94

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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.