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Finding the Fourth Proportional to 322.38, 444.69 and 319.55

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Solution

The fourth proportional to 322.38, 444.69 and 319.55 is: 440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.38 : 444.69 = 319.55 : x
  2. Step 2: Convert to fraction form
    322.38/444.69 = 319.55/x
  3. Step 3: Cross multiply
    322.38x = 444.69 × 319.55
  4. Step 4: Simplify right side
    322.38x = 142,098.47
  5. Step 5: Solve for x
    x = 142,098.47/322.38
  6. Step 6: Final answer
    x = 440.78

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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.