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Finding the Fourth Proportional to 218.14, 327.06 and 120.69

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Solution

The fourth proportional to 218.14, 327.06 and 120.69 is: 180.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.14 : 327.06 = 120.69 : x
  2. Step 2: Convert to fraction form
    218.14/327.06 = 120.69/x
  3. Step 3: Cross multiply
    218.14x = 327.06 × 120.69
  4. Step 4: Simplify right side
    218.14x = 39,472.87
  5. Step 5: Solve for x
    x = 39,472.87/218.14
  6. Step 6: Final answer
    x = 180.95

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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.