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Finding the Fourth Proportional to 363.88, 502.15 and 198.09

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Solution

The fourth proportional to 363.88, 502.15 and 198.09 is: 273.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.88 : 502.15 = 198.09 : x
  2. Step 2: Convert to fraction form
    363.88/502.15 = 198.09/x
  3. Step 3: Cross multiply
    363.88x = 502.15 × 198.09
  4. Step 4: Simplify right side
    363.88x = 99,470.89
  5. Step 5: Solve for x
    x = 99,470.89/363.88
  6. Step 6: Final answer
    x = 273.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.