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Finding the Fourth Proportional to 216.80, 325.34 and 108.66

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Solution

The fourth proportional to 216.80, 325.34 and 108.66 is: 163.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.80 : 325.34 = 108.66 : x
  2. Step 2: Convert to fraction form
    216.80/325.34 = 108.66/x
  3. Step 3: Cross multiply
    216.80x = 325.34 × 108.66
  4. Step 4: Simplify right side
    216.80x = 35,351.44
  5. Step 5: Solve for x
    x = 35,351.44/216.80
  6. Step 6: Final answer
    x = 163.06

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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.