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Finding the Fourth Proportional to 251.63, 377.07 and 129.73

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Solution

The fourth proportional to 251.63, 377.07 and 129.73 is: 194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.63 : 377.07 = 129.73 : x
  2. Step 2: Convert to fraction form
    251.63/377.07 = 129.73/x
  3. Step 3: Cross multiply
    251.63x = 377.07 × 129.73
  4. Step 4: Simplify right side
    251.63x = 48,917.29
  5. Step 5: Solve for x
    x = 48,917.29/251.63
  6. Step 6: Final answer
    x = 194.40

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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.