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Finding the Fourth Proportional to 218.17, 327.19 and 102.55

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Solution

The fourth proportional to 218.17, 327.19 and 102.55 is: 153.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.17 : 327.19 = 102.55 : x
  2. Step 2: Convert to fraction form
    218.17/327.19 = 102.55/x
  3. Step 3: Cross multiply
    218.17x = 327.19 × 102.55
  4. Step 4: Simplify right side
    218.17x = 33,552.26
  5. Step 5: Solve for x
    x = 33,552.26/218.17
  6. Step 6: Final answer
    x = 153.79

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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.