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Finding the Fourth Proportional to 3,937.56, 5,433.92 and 2,169.28

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Solution

The fourth proportional to 3,937.56, 5,433.92 and 2,169.28 is: 2,993.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.56 : 5,433.92 = 2,169.28 : x
  2. Step 2: Convert to fraction form
    3,937.56/5,433.92 = 2,169.28/x
  3. Step 3: Cross multiply
    3,937.56x = 5,433.92 × 2,169.28
  4. Step 4: Simplify right side
    3,937.56x = 11,787,693.98
  5. Step 5: Solve for x
    x = 11,787,693.98/3,937.56
  6. Step 6: Final answer
    x = 2,993.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.