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Finding the Fourth Proportional to 454.55, 681.94 and 129.95

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Solution

The fourth proportional to 454.55, 681.94 and 129.95 is: 194.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.55 : 681.94 = 129.95 : x
  2. Step 2: Convert to fraction form
    454.55/681.94 = 129.95/x
  3. Step 3: Cross multiply
    454.55x = 681.94 × 129.95
  4. Step 4: Simplify right side
    454.55x = 88,614.69
  5. Step 5: Solve for x
    x = 88,614.69/454.55
  6. Step 6: Final answer
    x = 194.95

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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.