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Finding the Fourth Proportional to 3,920.69, 5,879.26 and 2,820.44

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Solution

The fourth proportional to 3,920.69, 5,879.26 and 2,820.44 is: 4,229.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.69 : 5,879.26 = 2,820.44 : x
  2. Step 2: Convert to fraction form
    3,920.69/5,879.26 = 2,820.44/x
  3. Step 3: Cross multiply
    3,920.69x = 5,879.26 × 2,820.44
  4. Step 4: Simplify right side
    3,920.69x = 16,582,100.07
  5. Step 5: Solve for x
    x = 16,582,100.07/3,920.69
  6. Step 6: Final answer
    x = 4,229.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.