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Finding the Fourth Proportional to 282.20, 389.61 and 182.71

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Solution

The fourth proportional to 282.20, 389.61 and 182.71 is: 252.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.20 : 389.61 = 182.71 : x
  2. Step 2: Convert to fraction form
    282.20/389.61 = 182.71/x
  3. Step 3: Cross multiply
    282.20x = 389.61 × 182.71
  4. Step 4: Simplify right side
    282.20x = 71,183.94
  5. Step 5: Solve for x
    x = 71,183.94/282.20
  6. Step 6: Final answer
    x = 252.25

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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.