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Finding the Fourth Proportional to 372.96, 559.35 and 129.42

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Solution

The fourth proportional to 372.96, 559.35 and 129.42 is: 194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.96 : 559.35 = 129.42 : x
  2. Step 2: Convert to fraction form
    372.96/559.35 = 129.42/x
  3. Step 3: Cross multiply
    372.96x = 559.35 × 129.42
  4. Step 4: Simplify right side
    372.96x = 72,391.08
  5. Step 5: Solve for x
    x = 72,391.08/372.96
  6. Step 6: Final answer
    x = 194.10

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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.