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Finding the Fourth Proportional to 324.70, 447.75 and 226.42

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Solution

The fourth proportional to 324.70, 447.75 and 226.42 is: 312.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.70 : 447.75 = 226.42 : x
  2. Step 2: Convert to fraction form
    324.70/447.75 = 226.42/x
  3. Step 3: Cross multiply
    324.70x = 447.75 × 226.42
  4. Step 4: Simplify right side
    324.70x = 101,379.56
  5. Step 5: Solve for x
    x = 101,379.56/324.70
  6. Step 6: Final answer
    x = 312.23

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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.