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Finding the Fourth Proportional to 221.64, 306.18 and 204

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Solution

The fourth proportional to 221.64, 306.18 and 204 is: 281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.64 : 306.18 = 204 : x
  2. Step 2: Convert to fraction form
    221.64/306.18 = 204/x
  3. Step 3: Cross multiply
    221.64x = 306.18 × 204
  4. Step 4: Simplify right side
    221.64x = 62,460.72
  5. Step 5: Solve for x
    x = 62,460.72/221.64
  6. Step 6: Final answer
    x = 281.81

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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.