Home / 3,970.68-5,479.30-2,202.18

Finding the Fourth Proportional to 3,970.68, 5,479.30 and 2,202.18

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Solution

The fourth proportional to 3,970.68, 5,479.30 and 2,202.18 is: 3,038.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.68 : 5,479.30 = 2,202.18 : x
  2. Step 2: Convert to fraction form
    3,970.68/5,479.30 = 2,202.18/x
  3. Step 3: Cross multiply
    3,970.68x = 5,479.30 × 2,202.18
  4. Step 4: Simplify right side
    3,970.68x = 12,066,404.87
  5. Step 5: Solve for x
    x = 12,066,404.87/3,970.68
  6. Step 6: Final answer
    x = 3,038.88

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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.