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Finding the Fourth Proportional to 191.97, 266.09 and 178.61

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Solution

The fourth proportional to 191.97, 266.09 and 178.61 is: 247.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.97 : 266.09 = 178.61 : x
  2. Step 2: Convert to fraction form
    191.97/266.09 = 178.61/x
  3. Step 3: Cross multiply
    191.97x = 266.09 × 178.61
  4. Step 4: Simplify right side
    191.97x = 47,524.11
  5. Step 5: Solve for x
    x = 47,524.11/191.97
  6. Step 6: Final answer
    x = 247.56

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.