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Finding the Fourth Proportional to 397.90, 549.09 and 232.12

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Solution

The fourth proportional to 397.90, 549.09 and 232.12 is: 320.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.90 : 549.09 = 232.12 : x
  2. Step 2: Convert to fraction form
    397.90/549.09 = 232.12/x
  3. Step 3: Cross multiply
    397.90x = 549.09 × 232.12
  4. Step 4: Simplify right side
    397.90x = 127,456.35
  5. Step 5: Solve for x
    x = 127,456.35/397.90
  6. Step 6: Final answer
    x = 320.33

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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.