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Finding the Fourth Proportional to 2,240.86, 3,361.29 and 680.86

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Solution

The fourth proportional to 2,240.86, 3,361.29 and 680.86 is: 1,021.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,240.86 : 3,361.29 = 680.86 : x
  2. Step 2: Convert to fraction form
    2,240.86/3,361.29 = 680.86/x
  3. Step 3: Cross multiply
    2,240.86x = 3,361.29 × 680.86
  4. Step 4: Simplify right side
    2,240.86x = 2,288,563.93
  5. Step 5: Solve for x
    x = 2,288,563.93/2,240.86
  6. Step 6: Final answer
    x = 1,021.29

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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.