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Finding the Fourth Proportional to 327.60, 451.68 and 217.32

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Solution

The fourth proportional to 327.60, 451.68 and 217.32 is: 299.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.60 : 451.68 = 217.32 : x
  2. Step 2: Convert to fraction form
    327.60/451.68 = 217.32/x
  3. Step 3: Cross multiply
    327.60x = 451.68 × 217.32
  4. Step 4: Simplify right side
    327.60x = 98,159.10
  5. Step 5: Solve for x
    x = 98,159.10/327.60
  6. Step 6: Final answer
    x = 299.63

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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.