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Finding the Fourth Proportional to 372.71, 558.75 and 129.17

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Solution

The fourth proportional to 372.71, 558.75 and 129.17 is: 193.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.71 : 558.75 = 129.17 : x
  2. Step 2: Convert to fraction form
    372.71/558.75 = 129.17/x
  3. Step 3: Cross multiply
    372.71x = 558.75 × 129.17
  4. Step 4: Simplify right side
    372.71x = 72,173.74
  5. Step 5: Solve for x
    x = 72,173.74/372.71
  6. Step 6: Final answer
    x = 193.65

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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.