Home / 3,840.72-5,761.55-1,375.80

Finding the Fourth Proportional to 3,840.72, 5,761.55 and 1,375.80

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Solution

The fourth proportional to 3,840.72, 5,761.55 and 1,375.80 is: 2,063.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.72 : 5,761.55 = 1,375.80 : x
  2. Step 2: Convert to fraction form
    3,840.72/5,761.55 = 1,375.80/x
  3. Step 3: Cross multiply
    3,840.72x = 5,761.55 × 1,375.80
  4. Step 4: Simplify right side
    3,840.72x = 7,926,740.49
  5. Step 5: Solve for x
    x = 7,926,740.49/3,840.72
  6. Step 6: Final answer
    x = 2,063.87

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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.