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Finding the Fourth Proportional to 327.44, 448.87 and 321.54

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Solution

The fourth proportional to 327.44, 448.87 and 321.54 is: 440.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.44 : 448.87 = 321.54 : x
  2. Step 2: Convert to fraction form
    327.44/448.87 = 321.54/x
  3. Step 3: Cross multiply
    327.44x = 448.87 × 321.54
  4. Step 4: Simplify right side
    327.44x = 144,330.66
  5. Step 5: Solve for x
    x = 144,330.66/327.44
  6. Step 6: Final answer
    x = 440.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.