Home / 3,970.36-5,479.68-2,202.40

Finding the Fourth Proportional to 3,970.36, 5,479.68 and 2,202.40

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Solution

The fourth proportional to 3,970.36, 5,479.68 and 2,202.40 is: 3,039.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.36 : 5,479.68 = 2,202.40 : x
  2. Step 2: Convert to fraction form
    3,970.36/5,479.68 = 2,202.40/x
  3. Step 3: Cross multiply
    3,970.36x = 5,479.68 × 2,202.40
  4. Step 4: Simplify right side
    3,970.36x = 12,068,447.23
  5. Step 5: Solve for x
    x = 12,068,447.23/3,970.36
  6. Step 6: Final answer
    x = 3,039.64

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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.