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Finding the Fourth Proportional to 1,912.55, 2,869.00 and 743.11

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Solution

The fourth proportional to 1,912.55, 2,869.00 and 743.11 is: 1,114.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.55 : 2,869.00 = 743.11 : x
  2. Step 2: Convert to fraction form
    1,912.55/2,869.00 = 743.11/x
  3. Step 3: Cross multiply
    1,912.55x = 2,869.00 × 743.11
  4. Step 4: Simplify right side
    1,912.55x = 2,131,973.56
  5. Step 5: Solve for x
    x = 2,131,973.56/1,912.55
  6. Step 6: Final answer
    x = 1,114.73

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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.