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Finding the Fourth Proportional to 221.85, 332.82 and 130.56

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Solution

The fourth proportional to 221.85, 332.82 and 130.56 is: 195.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.85 : 332.82 = 130.56 : x
  2. Step 2: Convert to fraction form
    221.85/332.82 = 130.56/x
  3. Step 3: Cross multiply
    221.85x = 332.82 × 130.56
  4. Step 4: Simplify right side
    221.85x = 43,452.98
  5. Step 5: Solve for x
    x = 43,452.98/221.85
  6. Step 6: Final answer
    x = 195.87

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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.