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Finding the Fourth Proportional to 3,638.56, 5,021.22 and 1,982.56

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Solution

The fourth proportional to 3,638.56, 5,021.22 and 1,982.56 is: 2,735.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.56 : 5,021.22 = 1,982.56 : x
  2. Step 2: Convert to fraction form
    3,638.56/5,021.22 = 1,982.56/x
  3. Step 3: Cross multiply
    3,638.56x = 5,021.22 × 1,982.56
  4. Step 4: Simplify right side
    3,638.56x = 9,954,869.92
  5. Step 5: Solve for x
    x = 9,954,869.92/3,638.56
  6. Step 6: Final answer
    x = 2,735.94

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1.5x scale

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.