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Finding the Fourth Proportional to 329.38, 454.42 and 198.16

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Solution

The fourth proportional to 329.38, 454.42 and 198.16 is: 273.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.38 : 454.42 = 198.16 : x
  2. Step 2: Convert to fraction form
    329.38/454.42 = 198.16/x
  3. Step 3: Cross multiply
    329.38x = 454.42 × 198.16
  4. Step 4: Simplify right side
    329.38x = 90,047.87
  5. Step 5: Solve for x
    x = 90,047.87/329.38
  6. Step 6: Final answer
    x = 273.39

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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.