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Finding the Fourth Proportional to 321.67, 444.59 and 247.96

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Solution

The fourth proportional to 321.67, 444.59 and 247.96 is: 342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.67 : 444.59 = 247.96 : x
  2. Step 2: Convert to fraction form
    321.67/444.59 = 247.96/x
  3. Step 3: Cross multiply
    321.67x = 444.59 × 247.96
  4. Step 4: Simplify right side
    321.67x = 110,240.54
  5. Step 5: Solve for x
    x = 110,240.54/321.67
  6. Step 6: Final answer
    x = 342.71

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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.