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Finding the Fourth Proportional to 3,840.56, 5,760.12 and 1,375.28

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Solution

The fourth proportional to 3,840.56, 5,760.12 and 1,375.28 is: 2,062.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.56 : 5,760.12 = 1,375.28 : x
  2. Step 2: Convert to fraction form
    3,840.56/5,760.12 = 1,375.28/x
  3. Step 3: Cross multiply
    3,840.56x = 5,760.12 × 1,375.28
  4. Step 4: Simplify right side
    3,840.56x = 7,921,777.83
  5. Step 5: Solve for x
    x = 7,921,777.83/3,840.56
  6. Step 6: Final answer
    x = 2,062.66

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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.