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Finding the Fourth Proportional to 217.56, 299.52 and 203.88

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Solution

The fourth proportional to 217.56, 299.52 and 203.88 is: 280.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.56 : 299.52 = 203.88 : x
  2. Step 2: Convert to fraction form
    217.56/299.52 = 203.88/x
  3. Step 3: Cross multiply
    217.56x = 299.52 × 203.88
  4. Step 4: Simplify right side
    217.56x = 61,066.14
  5. Step 5: Solve for x
    x = 61,066.14/217.56
  6. Step 6: Final answer
    x = 280.69

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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.