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Finding the Fourth Proportional to 2,151.46, 3,227.60 and 853.03

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Solution

The fourth proportional to 2,151.46, 3,227.60 and 853.03 is: 1,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.46 : 3,227.60 = 853.03 : x
  2. Step 2: Convert to fraction form
    2,151.46/3,227.60 = 853.03/x
  3. Step 3: Cross multiply
    2,151.46x = 3,227.60 × 853.03
  4. Step 4: Simplify right side
    2,151.46x = 2,753,239.63
  5. Step 5: Solve for x
    x = 2,753,239.63/2,151.46
  6. Step 6: Final answer
    x = 1,279.71

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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.