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Finding the Fourth Proportional to 324.92, 445.17 and 320.87

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Solution

The fourth proportional to 324.92, 445.17 and 320.87 is: 439.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.92 : 445.17 = 320.87 : x
  2. Step 2: Convert to fraction form
    324.92/445.17 = 320.87/x
  3. Step 3: Cross multiply
    324.92x = 445.17 × 320.87
  4. Step 4: Simplify right side
    324.92x = 142,841.70
  5. Step 5: Solve for x
    x = 142,841.70/324.92
  6. Step 6: Final answer
    x = 439.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.