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Finding the Fourth Proportional to 239.22, 331.52 and 225.56

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Solution

The fourth proportional to 239.22, 331.52 and 225.56 is: 312.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.22 : 331.52 = 225.56 : x
  2. Step 2: Convert to fraction form
    239.22/331.52 = 225.56/x
  3. Step 3: Cross multiply
    239.22x = 331.52 × 225.56
  4. Step 4: Simplify right side
    239.22x = 74,777.35
  5. Step 5: Solve for x
    x = 74,777.35/239.22
  6. Step 6: Final answer
    x = 312.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.