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Finding the Fourth Proportional to 327.68, 451.80 and 240.20

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Solution

The fourth proportional to 327.68, 451.80 and 240.20 is: 331.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.68 : 451.80 = 240.20 : x
  2. Step 2: Convert to fraction form
    327.68/451.80 = 240.20/x
  3. Step 3: Cross multiply
    327.68x = 451.80 × 240.20
  4. Step 4: Simplify right side
    327.68x = 108,522.36
  5. Step 5: Solve for x
    x = 108,522.36/327.68
  6. Step 6: Final answer
    x = 331.18

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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.