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Finding the Fourth Proportional to 217.94, 327.17 and 206.60

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Solution

The fourth proportional to 217.94, 327.17 and 206.60 is: 310.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.94 : 327.17 = 206.60 : x
  2. Step 2: Convert to fraction form
    217.94/327.17 = 206.60/x
  3. Step 3: Cross multiply
    217.94x = 327.17 × 206.60
  4. Step 4: Simplify right side
    217.94x = 67,592.20
  5. Step 5: Solve for x
    x = 67,592.20/217.94
  6. Step 6: Final answer
    x = 310.15

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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.