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Finding the Fourth Proportional to 2,639.63, 3,958.33 and 791.01

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Solution

The fourth proportional to 2,639.63, 3,958.33 and 791.01 is: 1,186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.63 : 3,958.33 = 791.01 : x
  2. Step 2: Convert to fraction form
    2,639.63/3,958.33 = 791.01/x
  3. Step 3: Cross multiply
    2,639.63x = 3,958.33 × 791.01
  4. Step 4: Simplify right side
    2,639.63x = 3,131,054.87
  5. Step 5: Solve for x
    x = 3,131,054.87/2,639.63
  6. Step 6: Final answer
    x = 1,186.17

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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.