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Finding the Fourth Proportional to 322.17, 443.84 and 247.31

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Solution

The fourth proportional to 322.17, 443.84 and 247.31 is: 340.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.17 : 443.84 = 247.31 : x
  2. Step 2: Convert to fraction form
    322.17/443.84 = 247.31/x
  3. Step 3: Cross multiply
    322.17x = 443.84 × 247.31
  4. Step 4: Simplify right side
    322.17x = 109,766.07
  5. Step 5: Solve for x
    x = 109,766.07/322.17
  6. Step 6: Final answer
    x = 340.71

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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.