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Finding the Fourth Proportional to 329.38, 454.59 and 198.43

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Solution

The fourth proportional to 329.38, 454.59 and 198.43 is: 273.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.38 : 454.59 = 198.43 : x
  2. Step 2: Convert to fraction form
    329.38/454.59 = 198.43/x
  3. Step 3: Cross multiply
    329.38x = 454.59 × 198.43
  4. Step 4: Simplify right side
    329.38x = 90,204.29
  5. Step 5: Solve for x
    x = 90,204.29/329.38
  6. Step 6: Final answer
    x = 273.86

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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.