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Finding the Fourth Proportional to 321.38, 443.68 and 246.55

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Solution

The fourth proportional to 321.38, 443.68 and 246.55 is: 340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.38 : 443.68 = 246.55 : x
  2. Step 2: Convert to fraction form
    321.38/443.68 = 246.55/x
  3. Step 3: Cross multiply
    321.38x = 443.68 × 246.55
  4. Step 4: Simplify right side
    321.38x = 109,387.09
  5. Step 5: Solve for x
    x = 109,387.09/321.38
  6. Step 6: Final answer
    x = 340.37

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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.