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Finding the Fourth Proportional to 321.49, 443.52 and 197.14

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Solution

The fourth proportional to 321.49, 443.52 and 197.14 is: 271.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.49 : 443.52 = 197.14 : x
  2. Step 2: Convert to fraction form
    321.49/443.52 = 197.14/x
  3. Step 3: Cross multiply
    321.49x = 443.52 × 197.14
  4. Step 4: Simplify right side
    321.49x = 87,435.66
  5. Step 5: Solve for x
    x = 87,435.66/321.49
  6. Step 6: Final answer
    x = 271.97

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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.