Home / 3,899.20-5,380.27-2,220.64

Finding the Fourth Proportional to 3,899.20, 5,380.27 and 2,220.64

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Solution

The fourth proportional to 3,899.20, 5,380.27 and 2,220.64 is: 3,064.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.20 : 5,380.27 = 2,220.64 : x
  2. Step 2: Convert to fraction form
    3,899.20/5,380.27 = 2,220.64/x
  3. Step 3: Cross multiply
    3,899.20x = 5,380.27 × 2,220.64
  4. Step 4: Simplify right side
    3,899.20x = 11,947,636.26
  5. Step 5: Solve for x
    x = 11,947,636.26/3,899.20
  6. Step 6: Final answer
    x = 3,064.13

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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.