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Finding the Fourth Proportional to 3,331.72, 4,991.22 and 1,866.44

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Solution

The fourth proportional to 3,331.72, 4,991.22 and 1,866.44 is: 2,796.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,331.72 : 4,991.22 = 1,866.44 : x
  2. Step 2: Convert to fraction form
    3,331.72/4,991.22 = 1,866.44/x
  3. Step 3: Cross multiply
    3,331.72x = 4,991.22 × 1,866.44
  4. Step 4: Simplify right side
    3,331.72x = 9,315,812.66
  5. Step 5: Solve for x
    x = 9,315,812.66/3,331.72
  6. Step 6: Final answer
    x = 2,796.10

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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.