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Finding the Fourth Proportional to 353.39, 487.66 and 198.14

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Solution

The fourth proportional to 353.39, 487.66 and 198.14 is: 273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.39 : 487.66 = 198.14 : x
  2. Step 2: Convert to fraction form
    353.39/487.66 = 198.14/x
  3. Step 3: Cross multiply
    353.39x = 487.66 × 198.14
  4. Step 4: Simplify right side
    353.39x = 96,624.95
  5. Step 5: Solve for x
    x = 96,624.95/353.39
  6. Step 6: Final answer
    x = 273.42

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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.