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Finding the Fourth Proportional to 218.56, 327.92 and 141.67

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Solution

The fourth proportional to 218.56, 327.92 and 141.67 is: 212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.56 : 327.92 = 141.67 : x
  2. Step 2: Convert to fraction form
    218.56/327.92 = 141.67/x
  3. Step 3: Cross multiply
    218.56x = 327.92 × 141.67
  4. Step 4: Simplify right side
    218.56x = 46,456.43
  5. Step 5: Solve for x
    x = 46,456.43/218.56
  6. Step 6: Final answer
    x = 212.56

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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.