Home / 1,912.68-2,638.44-1,126.71

Finding the Fourth Proportional to 1,912.68, 2,638.44 and 1,126.71

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Solution

The fourth proportional to 1,912.68, 2,638.44 and 1,126.71 is: 1,554.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.68 : 2,638.44 = 1,126.71 : x
  2. Step 2: Convert to fraction form
    1,912.68/2,638.44 = 1,126.71/x
  3. Step 3: Cross multiply
    1,912.68x = 2,638.44 × 1,126.71
  4. Step 4: Simplify right side
    1,912.68x = 2,972,756.73
  5. Step 5: Solve for x
    x = 2,972,756.73/1,912.68
  6. Step 6: Final answer
    x = 1,554.24

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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.