Home / 1,278,489.42-1,915,408.35-744,391.22

Finding the Fourth Proportional to 1,278,489.42, 1,915,408.35 and 744,391.22

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Solution

The fourth proportional to 1,278,489.42, 1,915,408.35 and 744,391.22 is: 1,115,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,489.42 : 1,915,408.35 = 744,391.22 : x
  2. Step 2: Convert to fraction form
    1,278,489.42/1,915,408.35 = 744,391.22/x
  3. Step 3: Cross multiply
    1,278,489.42x = 1,915,408.35 × 744,391.22
  4. Step 4: Simplify right side
    1,278,489.42x = 1,425,813,148,877.65
  5. Step 5: Solve for x
    x = 1,425,813,148,877.65/1,278,489.42
  6. Step 6: Final answer
    x = 1,115,232.65

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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.