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Finding the Fourth Proportional to 426.22, 638.69 and 182.61

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Solution

The fourth proportional to 426.22, 638.69 and 182.61 is: 273.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.22 : 638.69 = 182.61 : x
  2. Step 2: Convert to fraction form
    426.22/638.69 = 182.61/x
  3. Step 3: Cross multiply
    426.22x = 638.69 × 182.61
  4. Step 4: Simplify right side
    426.22x = 116,630.27
  5. Step 5: Solve for x
    x = 116,630.27/426.22
  6. Step 6: Final answer
    x = 273.64

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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.