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Finding the Fourth Proportional to 3,676.72, 5,515.11 and 1,079.70

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Solution

The fourth proportional to 3,676.72, 5,515.11 and 1,079.70 is: 1,619.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,676.72 : 5,515.11 = 1,079.70 : x
  2. Step 2: Convert to fraction form
    3,676.72/5,515.11 = 1,079.70/x
  3. Step 3: Cross multiply
    3,676.72x = 5,515.11 × 1,079.70
  4. Step 4: Simplify right side
    3,676.72x = 5,954,664.27
  5. Step 5: Solve for x
    x = 5,954,664.27/3,676.72
  6. Step 6: Final answer
    x = 1,619.56

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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.