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Finding the Fourth Proportional to 217.14, 324.16 and 204.28

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Solution

The fourth proportional to 217.14, 324.16 and 204.28 is: 304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.14 : 324.16 = 204.28 : x
  2. Step 2: Convert to fraction form
    217.14/324.16 = 204.28/x
  3. Step 3: Cross multiply
    217.14x = 324.16 × 204.28
  4. Step 4: Simplify right side
    217.14x = 66,219.40
  5. Step 5: Solve for x
    x = 66,219.40/217.14
  6. Step 6: Final answer
    x = 304.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.