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Finding the Fourth Proportional to 494.62, 741.96 and 129.42

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Solution

The fourth proportional to 494.62, 741.96 and 129.42 is: 194.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.62 : 741.96 = 129.42 : x
  2. Step 2: Convert to fraction form
    494.62/741.96 = 129.42/x
  3. Step 3: Cross multiply
    494.62x = 741.96 × 129.42
  4. Step 4: Simplify right side
    494.62x = 96,024.46
  5. Step 5: Solve for x
    x = 96,024.46/494.62
  6. Step 6: Final answer
    x = 194.14

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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.