Home / 1,919.87-2,874.33-1,766.78

Finding the Fourth Proportional to 1,919.87, 2,874.33 and 1,766.78

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Solution

The fourth proportional to 1,919.87, 2,874.33 and 1,766.78 is: 2,645.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.87 : 2,874.33 = 1,766.78 : x
  2. Step 2: Convert to fraction form
    1,919.87/2,874.33 = 1,766.78/x
  3. Step 3: Cross multiply
    1,919.87x = 2,874.33 × 1,766.78
  4. Step 4: Simplify right side
    1,919.87x = 5,078,294.39
  5. Step 5: Solve for x
    x = 5,078,294.39/1,919.87
  6. Step 6: Final answer
    x = 2,645.13

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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.