Home / 1,286.12-1,919.77-1,104.68

Finding the Fourth Proportional to 1,286.12, 1,919.77 and 1,104.68

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Solution

The fourth proportional to 1,286.12, 1,919.77 and 1,104.68 is: 1,648.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.12 : 1,919.77 = 1,104.68 : x
  2. Step 2: Convert to fraction form
    1,286.12/1,919.77 = 1,104.68/x
  3. Step 3: Cross multiply
    1,286.12x = 1,919.77 × 1,104.68
  4. Step 4: Simplify right side
    1,286.12x = 2,120,739.78
  5. Step 5: Solve for x
    x = 2,120,739.78/1,286.12
  6. Step 6: Final answer
    x = 1,648.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.