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Finding the Fourth Proportional to 217.30, 299.28 and 201.64

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Solution

The fourth proportional to 217.30, 299.28 and 201.64 is: 277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.30 : 299.28 = 201.64 : x
  2. Step 2: Convert to fraction form
    217.30/299.28 = 201.64/x
  3. Step 3: Cross multiply
    217.30x = 299.28 × 201.64
  4. Step 4: Simplify right side
    217.30x = 60,346.82
  5. Step 5: Solve for x
    x = 60,346.82/217.30
  6. Step 6: Final answer
    x = 277.71

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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.