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Finding the Fourth Proportional to 324.31, 447.69 and 226.57

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Solution

The fourth proportional to 324.31, 447.69 and 226.57 is: 312.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.31 : 447.69 = 226.57 : x
  2. Step 2: Convert to fraction form
    324.31/447.69 = 226.57/x
  3. Step 3: Cross multiply
    324.31x = 447.69 × 226.57
  4. Step 4: Simplify right side
    324.31x = 101,433.12
  5. Step 5: Solve for x
    x = 101,433.12/324.31
  6. Step 6: Final answer
    x = 312.77

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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.