Home / 3,970.90-5,479.95-2,202.40

Finding the Fourth Proportional to 3,970.90, 5,479.95 and 2,202.40

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Solution

The fourth proportional to 3,970.90, 5,479.95 and 2,202.40 is: 3,039.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.90 : 5,479.95 = 2,202.40 : x
  2. Step 2: Convert to fraction form
    3,970.90/5,479.95 = 2,202.40/x
  3. Step 3: Cross multiply
    3,970.90x = 5,479.95 × 2,202.40
  4. Step 4: Simplify right side
    3,970.90x = 12,069,041.88
  5. Step 5: Solve for x
    x = 12,069,041.88/3,970.90
  6. Step 6: Final answer
    x = 3,039.37

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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.