Home / 3,970.98-5,479.88-2,202.55

Finding the Fourth Proportional to 3,970.98, 5,479.88 and 2,202.55

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Solution

The fourth proportional to 3,970.98, 5,479.88 and 2,202.55 is: 3,039.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.98 : 5,479.88 = 2,202.55 : x
  2. Step 2: Convert to fraction form
    3,970.98/5,479.88 = 2,202.55/x
  3. Step 3: Cross multiply
    3,970.98x = 5,479.88 × 2,202.55
  4. Step 4: Simplify right side
    3,970.98x = 12,069,684.98
  5. Step 5: Solve for x
    x = 12,069,684.98/3,970.98
  6. Step 6: Final answer
    x = 3,039.47

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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.