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Finding the Fourth Proportional to 227.78, 339.70 and 222.26

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Solution

The fourth proportional to 227.78, 339.70 and 222.26 is: 331.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.78 : 339.70 = 222.26 : x
  2. Step 2: Convert to fraction form
    227.78/339.70 = 222.26/x
  3. Step 3: Cross multiply
    227.78x = 339.70 × 222.26
  4. Step 4: Simplify right side
    227.78x = 75,501.72
  5. Step 5: Solve for x
    x = 75,501.72/227.78
  6. Step 6: Final answer
    x = 331.47

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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.