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Finding the Fourth Proportional to 224.60, 310.20 and 221.87

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Solution

The fourth proportional to 224.60, 310.20 and 221.87 is: 306.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.60 : 310.20 = 221.87 : x
  2. Step 2: Convert to fraction form
    224.60/310.20 = 221.87/x
  3. Step 3: Cross multiply
    224.60x = 310.20 × 221.87
  4. Step 4: Simplify right side
    224.60x = 68,822.52
  5. Step 5: Solve for x
    x = 68,822.52/224.60
  6. Step 6: Final answer
    x = 306.43

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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.