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Finding the Fourth Proportional to 321.78, 444.02 and 181.87

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Solution

The fourth proportional to 321.78, 444.02 and 181.87 is: 250.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.78 : 444.02 = 181.87 : x
  2. Step 2: Convert to fraction form
    321.78/444.02 = 181.87/x
  3. Step 3: Cross multiply
    321.78x = 444.02 × 181.87
  4. Step 4: Simplify right side
    321.78x = 80,753.92
  5. Step 5: Solve for x
    x = 80,753.92/321.78
  6. Step 6: Final answer
    x = 250.96

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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.