Home / 3,940.20-5,903.10-3,205.80

Finding the Fourth Proportional to 3,940.20, 5,903.10 and 3,205.80

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Solution

The fourth proportional to 3,940.20, 5,903.10 and 3,205.80 is: 4,802.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.20 : 5,903.10 = 3,205.80 : x
  2. Step 2: Convert to fraction form
    3,940.20/5,903.10 = 3,205.80/x
  3. Step 3: Cross multiply
    3,940.20x = 5,903.10 × 3,205.80
  4. Step 4: Simplify right side
    3,940.20x = 18,924,157.98
  5. Step 5: Solve for x
    x = 18,924,157.98/3,940.20
  6. Step 6: Final answer
    x = 4,802.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.