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Finding the Fourth Proportional to 3,986.08, 5,978.64 and 2,321.14

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Solution

The fourth proportional to 3,986.08, 5,978.64 and 2,321.14 is: 3,481.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.08 : 5,978.64 = 2,321.14 : x
  2. Step 2: Convert to fraction form
    3,986.08/5,978.64 = 2,321.14/x
  3. Step 3: Cross multiply
    3,986.08x = 5,978.64 × 2,321.14
  4. Step 4: Simplify right side
    3,986.08x = 13,877,260.45
  5. Step 5: Solve for x
    x = 13,877,260.45/3,986.08
  6. Step 6: Final answer
    x = 3,481.43

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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.