Home / 2,769.60-4,151.60-1,380.80

Finding the Fourth Proportional to 2,769.60, 4,151.60 and 1,380.80

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Solution

The fourth proportional to 2,769.60, 4,151.60 and 1,380.80 is: 2,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.60 : 4,151.60 = 1,380.80 : x
  2. Step 2: Convert to fraction form
    2,769.60/4,151.60 = 1,380.80/x
  3. Step 3: Cross multiply
    2,769.60x = 4,151.60 × 1,380.80
  4. Step 4: Simplify right side
    2,769.60x = 5,732,529.28
  5. Step 5: Solve for x
    x = 5,732,529.28/2,769.60
  6. Step 6: Final answer
    x = 2,069.80

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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.