Home / 2,840.39-3,919.92-1,721.43

Finding the Fourth Proportional to 2,840.39, 3,919.92 and 1,721.43

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Solution

The fourth proportional to 2,840.39, 3,919.92 and 1,721.43 is: 2,375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.39 : 3,919.92 = 1,721.43 : x
  2. Step 2: Convert to fraction form
    2,840.39/3,919.92 = 1,721.43/x
  3. Step 3: Cross multiply
    2,840.39x = 3,919.92 × 1,721.43
  4. Step 4: Simplify right side
    2,840.39x = 6,747,867.89
  5. Step 5: Solve for x
    x = 6,747,867.89/2,840.39
  6. Step 6: Final answer
    x = 2,375.69

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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.