Home / 2,640.80-3,961.20-1,665.56

Finding the Fourth Proportional to 2,640.80, 3,961.20 and 1,665.56

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Solution

The fourth proportional to 2,640.80, 3,961.20 and 1,665.56 is: 2,498.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.80 : 3,961.20 = 1,665.56 : x
  2. Step 2: Convert to fraction form
    2,640.80/3,961.20 = 1,665.56/x
  3. Step 3: Cross multiply
    2,640.80x = 3,961.20 × 1,665.56
  4. Step 4: Simplify right side
    2,640.80x = 6,597,616.27
  5. Step 5: Solve for x
    x = 6,597,616.27/2,640.80
  6. Step 6: Final answer
    x = 2,498.34

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Similar ratio
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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.