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Finding the Fourth Proportional to 3,850.32, 5,772 and 1,999.28

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Solution

The fourth proportional to 3,850.32, 5,772 and 1,999.28 is: 2,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,850.32 : 5,772 = 1,999.28 : x
  2. Step 2: Convert to fraction form
    3,850.32/5,772 = 1,999.28/x
  3. Step 3: Cross multiply
    3,850.32x = 5,772 × 1,999.28
  4. Step 4: Simplify right side
    3,850.32x = 11,539,844.16
  5. Step 5: Solve for x
    x = 11,539,844.16/3,850.32
  6. Step 6: Final answer
    x = 2,997.11

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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.