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Finding the Fourth Proportional to 3,879.78, 5,820.75 and 2,149.62

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Solution

The fourth proportional to 3,879.78, 5,820.75 and 2,149.62 is: 3,225.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.78 : 5,820.75 = 2,149.62 : x
  2. Step 2: Convert to fraction form
    3,879.78/5,820.75 = 2,149.62/x
  3. Step 3: Cross multiply
    3,879.78x = 5,820.75 × 2,149.62
  4. Step 4: Simplify right side
    3,879.78x = 12,512,400.62
  5. Step 5: Solve for x
    x = 12,512,400.62/3,879.78
  6. Step 6: Final answer
    x = 3,225.03

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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.