Home / 3,970.70-5,479.48-2,202.28

Finding the Fourth Proportional to 3,970.70, 5,479.48 and 2,202.28

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Solution

The fourth proportional to 3,970.70, 5,479.48 and 2,202.28 is: 3,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.70 : 5,479.48 = 2,202.28 : x
  2. Step 2: Convert to fraction form
    3,970.70/5,479.48 = 2,202.28/x
  3. Step 3: Cross multiply
    3,970.70x = 5,479.48 × 2,202.28
  4. Step 4: Simplify right side
    3,970.70x = 12,067,349.21
  5. Step 5: Solve for x
    x = 12,067,349.21/3,970.70
  6. Step 6: Final answer
    x = 3,039.10

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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.