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Finding the Fourth Proportional to 1,999.28, 2,998.83 and 767.27

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Solution

The fourth proportional to 1,999.28, 2,998.83 and 767.27 is: 1,150.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.28 : 2,998.83 = 767.27 : x
  2. Step 2: Convert to fraction form
    1,999.28/2,998.83 = 767.27/x
  3. Step 3: Cross multiply
    1,999.28x = 2,998.83 × 767.27
  4. Step 4: Simplify right side
    1,999.28x = 2,300,912.29
  5. Step 5: Solve for x
    x = 2,300,912.29/1,999.28
  6. Step 6: Final answer
    x = 1,150.87

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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.