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Finding the Fourth Proportional to 268.43, 402.76 and 129.55

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Solution

The fourth proportional to 268.43, 402.76 and 129.55 is: 194.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.43 : 402.76 = 129.55 : x
  2. Step 2: Convert to fraction form
    268.43/402.76 = 129.55/x
  3. Step 3: Cross multiply
    268.43x = 402.76 × 129.55
  4. Step 4: Simplify right side
    268.43x = 52,175.54
  5. Step 5: Solve for x
    x = 52,175.54/268.43
  6. Step 6: Final answer
    x = 194.37

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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.