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Finding the Fourth Proportional to 454.05, 680.96 and 129.35

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Solution

The fourth proportional to 454.05, 680.96 and 129.35 is: 193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.05 : 680.96 = 129.35 : x
  2. Step 2: Convert to fraction form
    454.05/680.96 = 129.35/x
  3. Step 3: Cross multiply
    454.05x = 680.96 × 129.35
  4. Step 4: Simplify right side
    454.05x = 88,078.12
  5. Step 5: Solve for x
    x = 88,078.12/454.05
  6. Step 6: Final answer
    x = 193.98

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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.