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Finding the Fourth Proportional to 3,943.56, 5,916 and 1,969.28

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Solution

The fourth proportional to 3,943.56, 5,916 and 1,969.28 is: 2,954.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.56 : 5,916 = 1,969.28 : x
  2. Step 2: Convert to fraction form
    3,943.56/5,916 = 1,969.28/x
  3. Step 3: Cross multiply
    3,943.56x = 5,916 × 1,969.28
  4. Step 4: Simplify right side
    3,943.56x = 11,650,260.48
  5. Step 5: Solve for x
    x = 11,650,260.48/3,943.56
  6. Step 6: Final answer
    x = 2,954.25

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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.