Home / 3,899.01-5,380.77-2,406.90

Finding the Fourth Proportional to 3,899.01, 5,380.77 and 2,406.90

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Solution

The fourth proportional to 3,899.01, 5,380.77 and 2,406.90 is: 3,321.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.01 : 5,380.77 = 2,406.90 : x
  2. Step 2: Convert to fraction form
    3,899.01/5,380.77 = 2,406.90/x
  3. Step 3: Cross multiply
    3,899.01x = 5,380.77 × 2,406.90
  4. Step 4: Simplify right side
    3,899.01x = 12,950,975.31
  5. Step 5: Solve for x
    x = 12,950,975.31/3,899.01
  6. Step 6: Final answer
    x = 3,321.61

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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.