Home / 2,760.80-4,141.20-812.96

Finding the Fourth Proportional to 2,760.80, 4,141.20 and 812.96

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Solution

The fourth proportional to 2,760.80, 4,141.20 and 812.96 is: 1,219.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760.80 : 4,141.20 = 812.96 : x
  2. Step 2: Convert to fraction form
    2,760.80/4,141.20 = 812.96/x
  3. Step 3: Cross multiply
    2,760.80x = 4,141.20 × 812.96
  4. Step 4: Simplify right side
    2,760.80x = 3,366,629.95
  5. Step 5: Solve for x
    x = 3,366,629.95/2,760.80
  6. Step 6: Final answer
    x = 1,219.44

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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.