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Finding the Fourth Proportional to 2,760.80, 3,810.21 and 1,581.86

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Solution

The fourth proportional to 2,760.80, 3,810.21 and 1,581.86 is: 2,183.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760.80 : 3,810.21 = 1,581.86 : x
  2. Step 2: Convert to fraction form
    2,760.80/3,810.21 = 1,581.86/x
  3. Step 3: Cross multiply
    2,760.80x = 3,810.21 × 1,581.86
  4. Step 4: Simplify right side
    2,760.80x = 6,027,218.79
  5. Step 5: Solve for x
    x = 6,027,218.79/2,760.80
  6. Step 6: Final answer
    x = 2,183.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.