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Finding the Fourth Proportional to 2,645.36, 3,967.79 and 796.43

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Solution

The fourth proportional to 2,645.36, 3,967.79 and 796.43 is: 1,194.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.36 : 3,967.79 = 796.43 : x
  2. Step 2: Convert to fraction form
    2,645.36/3,967.79 = 796.43/x
  3. Step 3: Cross multiply
    2,645.36x = 3,967.79 × 796.43
  4. Step 4: Simplify right side
    2,645.36x = 3,160,072.93
  5. Step 5: Solve for x
    x = 3,160,072.93/2,645.36
  6. Step 6: Final answer
    x = 1,194.57

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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.