Home / 1,912.73-2,869.38-680.31

Finding the Fourth Proportional to 1,912.73, 2,869.38 and 680.31

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Solution

The fourth proportional to 1,912.73, 2,869.38 and 680.31 is: 1,020.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.73 : 2,869.38 = 680.31 : x
  2. Step 2: Convert to fraction form
    1,912.73/2,869.38 = 680.31/x
  3. Step 3: Cross multiply
    1,912.73x = 2,869.38 × 680.31
  4. Step 4: Simplify right side
    1,912.73x = 1,952,067.91
  5. Step 5: Solve for x
    x = 1,952,067.91/1,912.73
  6. Step 6: Final answer
    x = 1,020.57

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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.