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Finding the Fourth Proportional to 227.17, 339.05 and 221.70

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Solution

The fourth proportional to 227.17, 339.05 and 221.70 is: 330.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.17 : 339.05 = 221.70 : x
  2. Step 2: Convert to fraction form
    227.17/339.05 = 221.70/x
  3. Step 3: Cross multiply
    227.17x = 339.05 × 221.70
  4. Step 4: Simplify right side
    227.17x = 75,167.39
  5. Step 5: Solve for x
    x = 75,167.39/227.17
  6. Step 6: Final answer
    x = 330.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.