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Finding the Fourth Proportional to 2,713.02, 4,069.05 and 765.21

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Solution

The fourth proportional to 2,713.02, 4,069.05 and 765.21 is: 1,147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.02 : 4,069.05 = 765.21 : x
  2. Step 2: Convert to fraction form
    2,713.02/4,069.05 = 765.21/x
  3. Step 3: Cross multiply
    2,713.02x = 4,069.05 × 765.21
  4. Step 4: Simplify right side
    2,713.02x = 3,113,677.75
  5. Step 5: Solve for x
    x = 3,113,677.75/2,713.02
  6. Step 6: Final answer
    x = 1,147.68

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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.