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Finding the Fourth Proportional to 217.18, 327.36 and 204.63

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Solution

The fourth proportional to 217.18, 327.36 and 204.63 is: 308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.18 : 327.36 = 204.63 : x
  2. Step 2: Convert to fraction form
    217.18/327.36 = 204.63/x
  3. Step 3: Cross multiply
    217.18x = 327.36 × 204.63
  4. Step 4: Simplify right side
    217.18x = 66,986.65
  5. Step 5: Solve for x
    x = 66,986.65/217.18
  6. Step 6: Final answer
    x = 308.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.