Home / 3,970.80-5,479.45-2,202.29

Finding the Fourth Proportional to 3,970.80, 5,479.45 and 2,202.29

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Solution

The fourth proportional to 3,970.80, 5,479.45 and 2,202.29 is: 3,039.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.80 : 5,479.45 = 2,202.29 : x
  2. Step 2: Convert to fraction form
    3,970.80/5,479.45 = 2,202.29/x
  3. Step 3: Cross multiply
    3,970.80x = 5,479.45 × 2,202.29
  4. Step 4: Simplify right side
    3,970.80x = 12,067,337.94
  5. Step 5: Solve for x
    x = 12,067,337.94/3,970.80
  6. Step 6: Final answer
    x = 3,039.02

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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.