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Finding the Fourth Proportional to 1,912.57, 2,869.83 and 872.44

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Solution

The fourth proportional to 1,912.57, 2,869.83 and 872.44 is: 1,309.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.57 : 2,869.83 = 872.44 : x
  2. Step 2: Convert to fraction form
    1,912.57/2,869.83 = 872.44/x
  3. Step 3: Cross multiply
    1,912.57x = 2,869.83 × 872.44
  4. Step 4: Simplify right side
    1,912.57x = 2,503,754.49
  5. Step 5: Solve for x
    x = 2,503,754.49/1,912.57
  6. Step 6: Final answer
    x = 1,309.10

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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.