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Finding the Fourth Proportional to 227.45, 339.01 and 220.85

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Solution

The fourth proportional to 227.45, 339.01 and 220.85 is: 329.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.45 : 339.01 = 220.85 : x
  2. Step 2: Convert to fraction form
    227.45/339.01 = 220.85/x
  3. Step 3: Cross multiply
    227.45x = 339.01 × 220.85
  4. Step 4: Simplify right side
    227.45x = 74,869.25
  5. Step 5: Solve for x
    x = 74,869.25/227.45
  6. Step 6: Final answer
    x = 329.17

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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.