Home / 3,105.95-4,286.25-1,689.65

Finding the Fourth Proportional to 3,105.95, 4,286.25 and 1,689.65

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Solution

The fourth proportional to 3,105.95, 4,286.25 and 1,689.65 is: 2,331.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.95 : 4,286.25 = 1,689.65 : x
  2. Step 2: Convert to fraction form
    3,105.95/4,286.25 = 1,689.65/x
  3. Step 3: Cross multiply
    3,105.95x = 4,286.25 × 1,689.65
  4. Step 4: Simplify right side
    3,105.95x = 7,242,232.43
  5. Step 5: Solve for x
    x = 7,242,232.43/3,105.95
  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.