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Finding the Fourth Proportional to 224.82, 310.50 and 221.78

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Solution

The fourth proportional to 224.82, 310.50 and 221.78 is: 306.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.82 : 310.50 = 221.78 : x
  2. Step 2: Convert to fraction form
    224.82/310.50 = 221.78/x
  3. Step 3: Cross multiply
    224.82x = 310.50 × 221.78
  4. Step 4: Simplify right side
    224.82x = 68,863.47
  5. Step 5: Solve for x
    x = 68,863.47/224.82
  6. Step 6: Final answer
    x = 306.30

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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.