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Finding the Fourth Proportional to 3,765.90, 5,645.72 and 2,839.62

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Solution

The fourth proportional to 3,765.90, 5,645.72 and 2,839.62 is: 4,257.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,765.90 : 5,645.72 = 2,839.62 : x
  2. Step 2: Convert to fraction form
    3,765.90/5,645.72 = 2,839.62/x
  3. Step 3: Cross multiply
    3,765.90x = 5,645.72 × 2,839.62
  4. Step 4: Simplify right side
    3,765.90x = 16,031,699.43
  5. Step 5: Solve for x
    x = 16,031,699.43/3,765.90
  6. Step 6: Final answer
    x = 4,257.07

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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.