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Finding the Fourth Proportional to 3,380.76, 5,071.21 and 1,531.54

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Solution

The fourth proportional to 3,380.76, 5,071.21 and 1,531.54 is: 2,297.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,380.76 : 5,071.21 = 1,531.54 : x
  2. Step 2: Convert to fraction form
    3,380.76/5,071.21 = 1,531.54/x
  3. Step 3: Cross multiply
    3,380.76x = 5,071.21 × 1,531.54
  4. Step 4: Simplify right side
    3,380.76x = 7,766,760.96
  5. Step 5: Solve for x
    x = 7,766,760.96/3,380.76
  6. Step 6: Final answer
    x = 2,297.34

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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.