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Finding the Fourth Proportional to 327.28, 451.83 and 216.90

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Solution

The fourth proportional to 327.28, 451.83 and 216.90 is: 299.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.28 : 451.83 = 216.90 : x
  2. Step 2: Convert to fraction form
    327.28/451.83 = 216.90/x
  3. Step 3: Cross multiply
    327.28x = 451.83 × 216.90
  4. Step 4: Simplify right side
    327.28x = 98,004.34
  5. Step 5: Solve for x
    x = 98,004.34/327.28
  6. Step 6: Final answer
    x = 299.45

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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.