Home / 2,680.90-3,697.25-1,939.75

Finding the Fourth Proportional to 2,680.90, 3,697.25 and 1,939.75

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Solution

The fourth proportional to 2,680.90, 3,697.25 and 1,939.75 is: 2,675.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.90 : 3,697.25 = 1,939.75 : x
  2. Step 2: Convert to fraction form
    2,680.90/3,697.25 = 1,939.75/x
  3. Step 3: Cross multiply
    2,680.90x = 3,697.25 × 1,939.75
  4. Step 4: Simplify right side
    2,680.90x = 7,171,721.75
  5. Step 5: Solve for x
    x = 7,171,721.75/2,680.90
  6. Step 6: Final answer
    x = 2,675.12

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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.