Home / 3,105-4,288.46-2,108.61

Finding the Fourth Proportional to 3,105, 4,288.46 and 2,108.61

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Solution

The fourth proportional to 3,105, 4,288.46 and 2,108.61 is: 2,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105 : 4,288.46 = 2,108.61 : x
  2. Step 2: Convert to fraction form
    3,105/4,288.46 = 2,108.61/x
  3. Step 3: Cross multiply
    3,105x = 4,288.46 × 2,108.61
  4. Step 4: Simplify right side
    3,105x = 9,042,679.10
  5. Step 5: Solve for x
    x = 9,042,679.10/3,105
  6. Step 6: Final answer
    x = 2,912.30

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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.