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Finding the Fourth Proportional to 334.98, 502.20 and 129.48

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Solution

The fourth proportional to 334.98, 502.20 and 129.48 is: 194.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.98 : 502.20 = 129.48 : x
  2. Step 2: Convert to fraction form
    334.98/502.20 = 129.48/x
  3. Step 3: Cross multiply
    334.98x = 502.20 × 129.48
  4. Step 4: Simplify right side
    334.98x = 65,024.86
  5. Step 5: Solve for x
    x = 65,024.86/334.98
  6. Step 6: Final answer
    x = 194.12

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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.