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Finding the Fourth Proportional to 2,810.87, 3,880.09 and 2,515.62

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Solution

The fourth proportional to 2,810.87, 3,880.09 and 2,515.62 is: 3,472.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.87 : 3,880.09 = 2,515.62 : x
  2. Step 2: Convert to fraction form
    2,810.87/3,880.09 = 2,515.62/x
  3. Step 3: Cross multiply
    2,810.87x = 3,880.09 × 2,515.62
  4. Step 4: Simplify right side
    2,810.87x = 9,760,819.43
  5. Step 5: Solve for x
    x = 9,760,819.43/2,810.87
  6. Step 6: Final answer
    x = 3,472.53

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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.