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Finding the Fourth Proportional to 2,791.74, 4,188.10 and 942.87

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Solution

The fourth proportional to 2,791.74, 4,188.10 and 942.87 is: 1,414.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.74 : 4,188.10 = 942.87 : x
  2. Step 2: Convert to fraction form
    2,791.74/4,188.10 = 942.87/x
  3. Step 3: Cross multiply
    2,791.74x = 4,188.10 × 942.87
  4. Step 4: Simplify right side
    2,791.74x = 3,948,833.85
  5. Step 5: Solve for x
    x = 3,948,833.85/2,791.74
  6. Step 6: Final answer
    x = 1,414.47

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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.