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Finding the Fourth Proportional to 335.38, 502.98 and 129.91

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Solution

The fourth proportional to 335.38, 502.98 and 129.91 is: 194.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.38 : 502.98 = 129.91 : x
  2. Step 2: Convert to fraction form
    335.38/502.98 = 129.91/x
  3. Step 3: Cross multiply
    335.38x = 502.98 × 129.91
  4. Step 4: Simplify right side
    335.38x = 65,342.13
  5. Step 5: Solve for x
    x = 65,342.13/335.38
  6. Step 6: Final answer
    x = 194.83

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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.