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Finding the Fourth Proportional to 372.81, 559.27 and 129.30

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Solution

The fourth proportional to 372.81, 559.27 and 129.30 is: 193.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.81 : 559.27 = 129.30 : x
  2. Step 2: Convert to fraction form
    372.81/559.27 = 129.30/x
  3. Step 3: Cross multiply
    372.81x = 559.27 × 129.30
  4. Step 4: Simplify right side
    372.81x = 72,311.68
  5. Step 5: Solve for x
    x = 72,311.68/372.81
  6. Step 6: Final answer
    x = 193.96

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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.