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Finding the Fourth Proportional to 321.02, 443.03 and 181.13

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Solution

The fourth proportional to 321.02, 443.03 and 181.13 is: 249.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.02 : 443.03 = 181.13 : x
  2. Step 2: Convert to fraction form
    321.02/443.03 = 181.13/x
  3. Step 3: Cross multiply
    321.02x = 443.03 × 181.13
  4. Step 4: Simplify right side
    321.02x = 80,242.90
  5. Step 5: Solve for x
    x = 80,242.90/321.02
  6. Step 6: Final answer
    x = 249.97

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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.