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Finding the Fourth Proportional to 217.89, 327.02 and 126.46

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Solution

The fourth proportional to 217.89, 327.02 and 126.46 is: 189.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.89 : 327.02 = 126.46 : x
  2. Step 2: Convert to fraction form
    217.89/327.02 = 126.46/x
  3. Step 3: Cross multiply
    217.89x = 327.02 × 126.46
  4. Step 4: Simplify right side
    217.89x = 41,352.68
  5. Step 5: Solve for x
    x = 41,352.68/217.89
  6. Step 6: Final answer
    x = 189.79

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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.