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Finding the Fourth Proportional to 324.64, 447.76 and 231.52

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Solution

The fourth proportional to 324.64, 447.76 and 231.52 is: 319.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.64 : 447.76 = 231.52 : x
  2. Step 2: Convert to fraction form
    324.64/447.76 = 231.52/x
  3. Step 3: Cross multiply
    324.64x = 447.76 × 231.52
  4. Step 4: Simplify right side
    324.64x = 103,665.40
  5. Step 5: Solve for x
    x = 103,665.40/324.64
  6. Step 6: Final answer
    x = 319.32

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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.