Home / 3,578.20-5,361.46-1,820.78

Finding the Fourth Proportional to 3,578.20, 5,361.46 and 1,820.78

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Solution

The fourth proportional to 3,578.20, 5,361.46 and 1,820.78 is: 2,728.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.20 : 5,361.46 = 1,820.78 : x
  2. Step 2: Convert to fraction form
    3,578.20/5,361.46 = 1,820.78/x
  3. Step 3: Cross multiply
    3,578.20x = 5,361.46 × 1,820.78
  4. Step 4: Simplify right side
    3,578.20x = 9,762,063.16
  5. Step 5: Solve for x
    x = 9,762,063.16/3,578.20
  6. Step 6: Final answer
    x = 2,728.21

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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.