Home / 1,939.82-2,683.99-1,691.65

Finding the Fourth Proportional to 1,939.82, 2,683.99 and 1,691.65

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Solution

The fourth proportional to 1,939.82, 2,683.99 and 1,691.65 is: 2,340.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.82 : 2,683.99 = 1,691.65 : x
  2. Step 2: Convert to fraction form
    1,939.82/2,683.99 = 1,691.65/x
  3. Step 3: Cross multiply
    1,939.82x = 2,683.99 × 1,691.65
  4. Step 4: Simplify right side
    1,939.82x = 4,540,371.68
  5. Step 5: Solve for x
    x = 4,540,371.68/1,939.82
  6. Step 6: Final answer
    x = 2,340.61

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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.