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Finding the Fourth Proportional to 495.08, 742.67 and 129.87

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Solution

The fourth proportional to 495.08, 742.67 and 129.87 is: 194.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.08 : 742.67 = 129.87 : x
  2. Step 2: Convert to fraction form
    495.08/742.67 = 129.87/x
  3. Step 3: Cross multiply
    495.08x = 742.67 × 129.87
  4. Step 4: Simplify right side
    495.08x = 96,452.41
  5. Step 5: Solve for x
    x = 96,452.41/495.08
  6. Step 6: Final answer
    x = 194.82

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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.