Home / 3,122.91-4,287.05-2,680.04

Finding the Fourth Proportional to 3,122.91, 4,287.05 and 2,680.04

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Solution

The fourth proportional to 3,122.91, 4,287.05 and 2,680.04 is: 3,679.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.91 : 4,287.05 = 2,680.04 : x
  2. Step 2: Convert to fraction form
    3,122.91/4,287.05 = 2,680.04/x
  3. Step 3: Cross multiply
    3,122.91x = 4,287.05 × 2,680.04
  4. Step 4: Simplify right side
    3,122.91x = 11,489,465.48
  5. Step 5: Solve for x
    x = 11,489,465.48/3,122.91
  6. Step 6: Final answer
    x = 3,679.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.