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Finding the Fourth Proportional to 2,791.80, 4,188.33 and 942.80

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Solution

The fourth proportional to 2,791.80, 4,188.33 and 942.80 is: 1,414.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.80 : 4,188.33 = 942.80 : x
  2. Step 2: Convert to fraction form
    2,791.80/4,188.33 = 942.80/x
  3. Step 3: Cross multiply
    2,791.80x = 4,188.33 × 942.80
  4. Step 4: Simplify right side
    2,791.80x = 3,948,736.58
  5. Step 5: Solve for x
    x = 3,948,736.58/2,791.80
  6. Step 6: Final answer
    x = 1,414.41

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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.