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Finding the Fourth Proportional to 218.42, 327.28 and 160.78

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Solution

The fourth proportional to 218.42, 327.28 and 160.78 is: 240.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.42 : 327.28 = 160.78 : x
  2. Step 2: Convert to fraction form
    218.42/327.28 = 160.78/x
  3. Step 3: Cross multiply
    218.42x = 327.28 × 160.78
  4. Step 4: Simplify right side
    218.42x = 52,620.08
  5. Step 5: Solve for x
    x = 52,620.08/218.42
  6. Step 6: Final answer
    x = 240.91

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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.