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Finding the Fourth Proportional to 494.92, 742.45 and 187.17

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Solution

The fourth proportional to 494.92, 742.45 and 187.17 is: 280.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.92 : 742.45 = 187.17 : x
  2. Step 2: Convert to fraction form
    494.92/742.45 = 187.17/x
  3. Step 3: Cross multiply
    494.92x = 742.45 × 187.17
  4. Step 4: Simplify right side
    494.92x = 138,960.19
  5. Step 5: Solve for x
    x = 138,960.19/494.92
  6. Step 6: Final answer
    x = 280.77

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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.