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Finding the Fourth Proportional to 221.70, 306.24 and 177.54

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Solution

The fourth proportional to 221.70, 306.24 and 177.54 is: 245.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.70 : 306.24 = 177.54 : x
  2. Step 2: Convert to fraction form
    221.70/306.24 = 177.54/x
  3. Step 3: Cross multiply
    221.70x = 306.24 × 177.54
  4. Step 4: Simplify right side
    221.70x = 54,369.85
  5. Step 5: Solve for x
    x = 54,369.85/221.70
  6. Step 6: Final answer
    x = 245.24

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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.