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Finding the Fourth Proportional to 323.84, 447.36 and 225.56

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Solution

The fourth proportional to 323.84, 447.36 and 225.56 is: 311.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.84 : 447.36 = 225.56 : x
  2. Step 2: Convert to fraction form
    323.84/447.36 = 225.56/x
  3. Step 3: Cross multiply
    323.84x = 447.36 × 225.56
  4. Step 4: Simplify right side
    323.84x = 100,906.52
  5. Step 5: Solve for x
    x = 100,906.52/323.84
  6. Step 6: Final answer
    x = 311.59

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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.