Home / 3,105.72-4,286.70-2,057.40

Finding the Fourth Proportional to 3,105.72, 4,286.70 and 2,057.40

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Solution

The fourth proportional to 3,105.72, 4,286.70 and 2,057.40 is: 2,839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.72 : 4,286.70 = 2,057.40 : x
  2. Step 2: Convert to fraction form
    3,105.72/4,286.70 = 2,057.40/x
  3. Step 3: Cross multiply
    3,105.72x = 4,286.70 × 2,057.40
  4. Step 4: Simplify right side
    3,105.72x = 8,819,456.58
  5. Step 5: Solve for x
    x = 8,819,456.58/3,105.72
  6. Step 6: Final answer
    x = 2,839.75

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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.