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Finding the Fourth Proportional to 2,738.72, 4,108.68 and 791.08

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Solution

The fourth proportional to 2,738.72, 4,108.68 and 791.08 is: 1,186.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738.72 : 4,108.68 = 791.08 : x
  2. Step 2: Convert to fraction form
    2,738.72/4,108.68 = 791.08/x
  3. Step 3: Cross multiply
    2,738.72x = 4,108.68 × 791.08
  4. Step 4: Simplify right side
    2,738.72x = 3,250,294.57
  5. Step 5: Solve for x
    x = 3,250,294.57/2,738.72
  6. Step 6: Final answer
    x = 1,186.79

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1.5x scale

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.