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Finding the Fourth Proportional to 217.32, 326.26 and 144.20

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Solution

The fourth proportional to 217.32, 326.26 and 144.20 is: 216.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.32 : 326.26 = 144.20 : x
  2. Step 2: Convert to fraction form
    217.32/326.26 = 144.20/x
  3. Step 3: Cross multiply
    217.32x = 326.26 × 144.20
  4. Step 4: Simplify right side
    217.32x = 47,046.69
  5. Step 5: Solve for x
    x = 47,046.69/217.32
  6. Step 6: Final answer
    x = 216.49

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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.