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Finding the Fourth Proportional to 221.99, 306.38 and 134.66

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Solution

The fourth proportional to 221.99, 306.38 and 134.66 is: 185.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.99 : 306.38 = 134.66 : x
  2. Step 2: Convert to fraction form
    221.99/306.38 = 134.66/x
  3. Step 3: Cross multiply
    221.99x = 306.38 × 134.66
  4. Step 4: Simplify right side
    221.99x = 41,257.73
  5. Step 5: Solve for x
    x = 41,257.73/221.99
  6. Step 6: Final answer
    x = 185.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.