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Finding the Fourth Proportional to 321.43, 481.82 and 104.86

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Solution

The fourth proportional to 321.43, 481.82 and 104.86 is: 157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.43 : 481.82 = 104.86 : x
  2. Step 2: Convert to fraction form
    321.43/481.82 = 104.86/x
  3. Step 3: Cross multiply
    321.43x = 481.82 × 104.86
  4. Step 4: Simplify right side
    321.43x = 50,520.71
  5. Step 5: Solve for x
    x = 50,520.71/321.43
  6. Step 6: Final answer
    x = 157.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.