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Finding the Fourth Proportional to 2,712.87, 4,069.37 and 765.03

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Solution

The fourth proportional to 2,712.87, 4,069.37 and 765.03 is: 1,147.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.87 : 4,069.37 = 765.03 : x
  2. Step 2: Convert to fraction form
    2,712.87/4,069.37 = 765.03/x
  3. Step 3: Cross multiply
    2,712.87x = 4,069.37 × 765.03
  4. Step 4: Simplify right side
    2,712.87x = 3,113,186.31
  5. Step 5: Solve for x
    x = 3,113,186.31/2,712.87
  6. Step 6: Final answer
    x = 1,147.56

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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.