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Finding the Fourth Proportional to 321.14, 481.10 and 218.13

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Solution

The fourth proportional to 321.14, 481.10 and 218.13 is: 326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.14 : 481.10 = 218.13 : x
  2. Step 2: Convert to fraction form
    321.14/481.10 = 218.13/x
  3. Step 3: Cross multiply
    321.14x = 481.10 × 218.13
  4. Step 4: Simplify right side
    321.14x = 104,941.25
  5. Step 5: Solve for x
    x = 104,941.25/321.14
  6. Step 6: Final answer
    x = 326.78

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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.