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Finding the Fourth Proportional to 322.92, 443.88 and 289.44

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Solution

The fourth proportional to 322.92, 443.88 and 289.44 is: 397.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.92 : 443.88 = 289.44 : x
  2. Step 2: Convert to fraction form
    322.92/443.88 = 289.44/x
  3. Step 3: Cross multiply
    322.92x = 443.88 × 289.44
  4. Step 4: Simplify right side
    322.92x = 128,476.63
  5. Step 5: Solve for x
    x = 128,476.63/322.92
  6. Step 6: Final answer
    x = 397.86

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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.