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Finding the Fourth Proportional to 2,868.69, 3,960.11 and 2,205.30

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Solution

The fourth proportional to 2,868.69, 3,960.11 and 2,205.30 is: 3,044.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.69 : 3,960.11 = 2,205.30 : x
  2. Step 2: Convert to fraction form
    2,868.69/3,960.11 = 2,205.30/x
  3. Step 3: Cross multiply
    2,868.69x = 3,960.11 × 2,205.30
  4. Step 4: Simplify right side
    2,868.69x = 8,733,230.58
  5. Step 5: Solve for x
    x = 8,733,230.58/2,868.69
  6. Step 6: Final answer
    x = 3,044.33

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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.