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Finding the Fourth Proportional to 2,647.37, 3,971.10 and 892.04

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Solution

The fourth proportional to 2,647.37, 3,971.10 and 892.04 is: 1,338.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.37 : 3,971.10 = 892.04 : x
  2. Step 2: Convert to fraction form
    2,647.37/3,971.10 = 892.04/x
  3. Step 3: Cross multiply
    2,647.37x = 3,971.10 × 892.04
  4. Step 4: Simplify right side
    2,647.37x = 3,542,389.97
  5. Step 5: Solve for x
    x = 3,542,389.97/2,647.37
  6. Step 6: Final answer
    x = 1,338.08

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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.