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Finding the Fourth Proportional to 2,668.39, 4,002.64 and 819.46

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Solution

The fourth proportional to 2,668.39, 4,002.64 and 819.46 is: 1,229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.39 : 4,002.64 = 819.46 : x
  2. Step 2: Convert to fraction form
    2,668.39/4,002.64 = 819.46/x
  3. Step 3: Cross multiply
    2,668.39x = 4,002.64 × 819.46
  4. Step 4: Simplify right side
    2,668.39x = 3,280,003.37
  5. Step 5: Solve for x
    x = 3,280,003.37/2,668.39
  6. Step 6: Final answer
    x = 1,229.21

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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.