Home / 1,912.90-2,639.91-1,073.56

Finding the Fourth Proportional to 1,912.90, 2,639.91 and 1,073.56

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Solution

The fourth proportional to 1,912.90, 2,639.91 and 1,073.56 is: 1,481.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.90 : 2,639.91 = 1,073.56 : x
  2. Step 2: Convert to fraction form
    1,912.90/2,639.91 = 1,073.56/x
  3. Step 3: Cross multiply
    1,912.90x = 2,639.91 × 1,073.56
  4. Step 4: Simplify right side
    1,912.90x = 2,834,101.78
  5. Step 5: Solve for x
    x = 2,834,101.78/1,912.90
  6. Step 6: Final answer
    x = 1,481.57

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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.