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Finding the Fourth Proportional to 372.79, 559.25 and 129.48

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Solution

The fourth proportional to 372.79, 559.25 and 129.48 is: 194.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.79 : 559.25 = 129.48 : x
  2. Step 2: Convert to fraction form
    372.79/559.25 = 129.48/x
  3. Step 3: Cross multiply
    372.79x = 559.25 × 129.48
  4. Step 4: Simplify right side
    372.79x = 72,411.69
  5. Step 5: Solve for x
    x = 72,411.69/372.79
  6. Step 6: Final answer
    x = 194.24

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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.