Home / 3,105.97-4,286.18-1,689.69

Finding the Fourth Proportional to 3,105.97, 4,286.18 and 1,689.69

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Solution

The fourth proportional to 3,105.97, 4,286.18 and 1,689.69 is: 2,331.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.97 : 4,286.18 = 1,689.69 : x
  2. Step 2: Convert to fraction form
    3,105.97/4,286.18 = 1,689.69/x
  3. Step 3: Cross multiply
    3,105.97x = 4,286.18 × 1,689.69
  4. Step 4: Simplify right side
    3,105.97x = 7,242,285.60
  5. Step 5: Solve for x
    x = 7,242,285.60/3,105.97
  6. Step 6: Final answer
    x = 2,331.73

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1.5x scale

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.