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Finding the Fourth Proportional to 3,881.31, 5,819.69 and 1,539.40

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Solution

The fourth proportional to 3,881.31, 5,819.69 and 1,539.40 is: 2,308.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.31 : 5,819.69 = 1,539.40 : x
  2. Step 2: Convert to fraction form
    3,881.31/5,819.69 = 1,539.40/x
  3. Step 3: Cross multiply
    3,881.31x = 5,819.69 × 1,539.40
  4. Step 4: Simplify right side
    3,881.31x = 8,958,793.99
  5. Step 5: Solve for x
    x = 8,958,793.99/3,881.31
  6. Step 6: Final answer
    x = 2,308.19

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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.