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Finding the Fourth Proportional to 285.17, 426.92 and 182.21

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Solution

The fourth proportional to 285.17, 426.92 and 182.21 is: 272.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.17 : 426.92 = 182.21 : x
  2. Step 2: Convert to fraction form
    285.17/426.92 = 182.21/x
  3. Step 3: Cross multiply
    285.17x = 426.92 × 182.21
  4. Step 4: Simplify right side
    285.17x = 77,786.05
  5. Step 5: Solve for x
    x = 77,786.05/285.17
  6. Step 6: Final answer
    x = 272.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.