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Finding the Fourth Proportional to 3,963, 5,469.22 and 2,391

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Solution

The fourth proportional to 3,963, 5,469.22 and 2,391 is: 3,299.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,963 : 5,469.22 = 2,391 : x
  2. Step 2: Convert to fraction form
    3,963/5,469.22 = 2,391/x
  3. Step 3: Cross multiply
    3,963x = 5,469.22 × 2,391
  4. Step 4: Simplify right side
    3,963x = 13,076,905.02
  5. Step 5: Solve for x
    x = 13,076,905.02/3,963
  6. Step 6: Final answer
    x = 3,299.75

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Why These Related Problems?

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