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Finding the Fourth Proportional to 217.35, 326.21 and 169.56

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Solution

The fourth proportional to 217.35, 326.21 and 169.56 is: 254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.35 : 326.21 = 169.56 : x
  2. Step 2: Convert to fraction form
    217.35/326.21 = 169.56/x
  3. Step 3: Cross multiply
    217.35x = 326.21 × 169.56
  4. Step 4: Simplify right side
    217.35x = 55,311.32
  5. Step 5: Solve for x
    x = 55,311.32/217.35
  6. Step 6: Final answer
    x = 254.48

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