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Finding the Fourth Proportional to 191.97, 286.76 and 126.43

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Solution

The fourth proportional to 191.97, 286.76 and 126.43 is: 188.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.97 : 286.76 = 126.43 : x
  2. Step 2: Convert to fraction form
    191.97/286.76 = 126.43/x
  3. Step 3: Cross multiply
    191.97x = 286.76 × 126.43
  4. Step 4: Simplify right side
    191.97x = 36,253.95
  5. Step 5: Solve for x
    x = 36,253.95/191.97
  6. Step 6: Final answer
    x = 188.85

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.