Home / 1,912.26-2,639.31-1,240.91

Finding the Fourth Proportional to 1,912.26, 2,639.31 and 1,240.91

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Solution

The fourth proportional to 1,912.26, 2,639.31 and 1,240.91 is: 1,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.26 : 2,639.31 = 1,240.91 : x
  2. Step 2: Convert to fraction form
    1,912.26/2,639.31 = 1,240.91/x
  3. Step 3: Cross multiply
    1,912.26x = 2,639.31 × 1,240.91
  4. Step 4: Simplify right side
    1,912.26x = 3,275,132.98
  5. Step 5: Solve for x
    x = 3,275,132.98/1,912.26
  6. Step 6: Final answer
    x = 1,712.70

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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.