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Finding the Fourth Proportional to 324.71, 447.62 and 231.42

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Solution

The fourth proportional to 324.71, 447.62 and 231.42 is: 319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.71 : 447.62 = 231.42 : x
  2. Step 2: Convert to fraction form
    324.71/447.62 = 231.42/x
  3. Step 3: Cross multiply
    324.71x = 447.62 × 231.42
  4. Step 4: Simplify right side
    324.71x = 103,587.12
  5. Step 5: Solve for x
    x = 103,587.12/324.71
  6. Step 6: Final answer
    x = 319.02

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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.