Home / 3,970.50-5,479.29-2,202.38

Finding the Fourth Proportional to 3,970.50, 5,479.29 and 2,202.38

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Solution

The fourth proportional to 3,970.50, 5,479.29 and 2,202.38 is: 3,039.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.50 : 5,479.29 = 2,202.38 : x
  2. Step 2: Convert to fraction form
    3,970.50/5,479.29 = 2,202.38/x
  3. Step 3: Cross multiply
    3,970.50x = 5,479.29 × 2,202.38
  4. Step 4: Simplify right side
    3,970.50x = 12,067,478.71
  5. Step 5: Solve for x
    x = 12,067,478.71/3,970.50
  6. Step 6: Final answer
    x = 3,039.28

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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.