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Finding the Fourth Proportional to 321.17, 443.30 and 203.27

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Solution

The fourth proportional to 321.17, 443.30 and 203.27 is: 280.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.17 : 443.30 = 203.27 : x
  2. Step 2: Convert to fraction form
    321.17/443.30 = 203.27/x
  3. Step 3: Cross multiply
    321.17x = 443.30 × 203.27
  4. Step 4: Simplify right side
    321.17x = 90,106.36
  5. Step 5: Solve for x
    x = 90,106.36/321.17
  6. Step 6: Final answer
    x = 280.56

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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.