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Finding the Fourth Proportional to 3,638, 5,481.77 and 3,240.16

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Solution

The fourth proportional to 3,638, 5,481.77 and 3,240.16 is: 4,882.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638 : 5,481.77 = 3,240.16 : x
  2. Step 2: Convert to fraction form
    3,638/5,481.77 = 3,240.16/x
  3. Step 3: Cross multiply
    3,638x = 5,481.77 × 3,240.16
  4. Step 4: Simplify right side
    3,638x = 17,761,811.88
  5. Step 5: Solve for x
    x = 17,761,811.88/3,638
  6. Step 6: Final answer
    x = 4,882.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.