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Finding the Fourth Proportional to 327.11, 490.35 and 141.89

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Solution

The fourth proportional to 327.11, 490.35 and 141.89 is: 212.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.11 : 490.35 = 141.89 : x
  2. Step 2: Convert to fraction form
    327.11/490.35 = 141.89/x
  3. Step 3: Cross multiply
    327.11x = 490.35 × 141.89
  4. Step 4: Simplify right side
    327.11x = 69,576.99
  5. Step 5: Solve for x
    x = 69,576.99/327.11
  6. Step 6: Final answer
    x = 212.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.