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Finding the Fourth Proportional to 251.96, 377.68 and 129.95

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Solution

The fourth proportional to 251.96, 377.68 and 129.95 is: 194.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.96 : 377.68 = 129.95 : x
  2. Step 2: Convert to fraction form
    251.96/377.68 = 129.95/x
  3. Step 3: Cross multiply
    251.96x = 377.68 × 129.95
  4. Step 4: Simplify right side
    251.96x = 49,079.52
  5. Step 5: Solve for x
    x = 49,079.52/251.96
  6. Step 6: Final answer
    x = 194.79

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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.