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Finding the Fourth Proportional to 892.38, 1,236.47 and 872.22

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Solution

The fourth proportional to 892.38, 1,236.47 and 872.22 is: 1,208.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.38 : 1,236.47 = 872.22 : x
  2. Step 2: Convert to fraction form
    892.38/1,236.47 = 872.22/x
  3. Step 3: Cross multiply
    892.38x = 1,236.47 × 872.22
  4. Step 4: Simplify right side
    892.38x = 1,078,469.50
  5. Step 5: Solve for x
    x = 1,078,469.50/892.38
  6. Step 6: Final answer
    x = 1,208.53

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.