Home / 3,260.80-4,891.20-2,161.60

Finding the Fourth Proportional to 3,260.80, 4,891.20 and 2,161.60

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Solution

The fourth proportional to 3,260.80, 4,891.20 and 2,161.60 is: 3,242.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,260.80 : 4,891.20 = 2,161.60 : x
  2. Step 2: Convert to fraction form
    3,260.80/4,891.20 = 2,161.60/x
  3. Step 3: Cross multiply
    3,260.80x = 4,891.20 × 2,161.60
  4. Step 4: Simplify right side
    3,260.80x = 10,572,817.92
  5. Step 5: Solve for x
    x = 10,572,817.92/3,260.80
  6. Step 6: Final answer
    x = 3,242.40

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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.