Home / 3,899.19-5,380.89-2,406.77

Finding the Fourth Proportional to 3,899.19, 5,380.89 and 2,406.77

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Solution

The fourth proportional to 3,899.19, 5,380.89 and 2,406.77 is: 3,321.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.19 : 5,380.89 = 2,406.77 : x
  2. Step 2: Convert to fraction form
    3,899.19/5,380.89 = 2,406.77/x
  3. Step 3: Cross multiply
    3,899.19x = 5,380.89 × 2,406.77
  4. Step 4: Simplify right side
    3,899.19x = 12,950,564.63
  5. Step 5: Solve for x
    x = 12,950,564.63/3,899.19
  6. Step 6: Final answer
    x = 3,321.35

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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.