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Finding the Fourth Proportional to 272.97, 408.65 and 218.43

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Solution

The fourth proportional to 272.97, 408.65 and 218.43 is: 327.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.97 : 408.65 = 218.43 : x
  2. Step 2: Convert to fraction form
    272.97/408.65 = 218.43/x
  3. Step 3: Cross multiply
    272.97x = 408.65 × 218.43
  4. Step 4: Simplify right side
    272.97x = 89,260.33
  5. Step 5: Solve for x
    x = 89,260.33/272.97
  6. Step 6: Final answer
    x = 327.00

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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.