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Finding the Fourth Proportional to 3,894.12, 5,371.22 and 2,321

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Solution

The fourth proportional to 3,894.12, 5,371.22 and 2,321 is: 3,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.12 : 5,371.22 = 2,321 : x
  2. Step 2: Convert to fraction form
    3,894.12/5,371.22 = 2,321/x
  3. Step 3: Cross multiply
    3,894.12x = 5,371.22 × 2,321
  4. Step 4: Simplify right side
    3,894.12x = 12,466,601.62
  5. Step 5: Solve for x
    x = 12,466,601.62/3,894.12
  6. Step 6: Final answer
    x = 3,201.39

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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.