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Finding the Fourth Proportional to 249.61, 374.09 and 127.91

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Solution

The fourth proportional to 249.61, 374.09 and 127.91 is: 191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.61 : 374.09 = 127.91 : x
  2. Step 2: Convert to fraction form
    249.61/374.09 = 127.91/x
  3. Step 3: Cross multiply
    249.61x = 374.09 × 127.91
  4. Step 4: Simplify right side
    249.61x = 47,850.63
  5. Step 5: Solve for x
    x = 47,850.63/249.61
  6. Step 6: Final answer
    x = 191.70

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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.