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Finding the Fourth Proportional to 3,850.56, 5,775.12 and 1,385.28

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Solution

The fourth proportional to 3,850.56, 5,775.12 and 1,385.28 is: 2,077.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.56 : 5,775.12 = 1,385.28 : x
  2. Step 2: Convert to fraction form
    3,850.56/5,775.12 = 1,385.28/x
  3. Step 3: Cross multiply
    3,850.56x = 5,775.12 × 1,385.28
  4. Step 4: Simplify right side
    3,850.56x = 8,000,158.23
  5. Step 5: Solve for x
    x = 8,000,158.23/3,850.56
  6. Step 6: Final answer
    x = 2,077.66

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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.