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Finding the Fourth Proportional to 439.62, 657.87 and 323.79

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Solution

The fourth proportional to 439.62, 657.87 and 323.79 is: 484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.62 : 657.87 = 323.79 : x
  2. Step 2: Convert to fraction form
    439.62/657.87 = 323.79/x
  3. Step 3: Cross multiply
    439.62x = 657.87 × 323.79
  4. Step 4: Simplify right side
    439.62x = 213,008.44
  5. Step 5: Solve for x
    x = 213,008.44/439.62
  6. Step 6: Final answer
    x = 484.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.