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Finding the Fourth Proportional to 353.55, 487.89 and 196.17

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Solution

The fourth proportional to 353.55, 487.89 and 196.17 is: 270.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.55 : 487.89 = 196.17 : x
  2. Step 2: Convert to fraction form
    353.55/487.89 = 196.17/x
  3. Step 3: Cross multiply
    353.55x = 487.89 × 196.17
  4. Step 4: Simplify right side
    353.55x = 95,709.38
  5. Step 5: Solve for x
    x = 95,709.38/353.55
  6. Step 6: Final answer
    x = 270.71

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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.