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Finding the Fourth Proportional to 1,793.44, 2,690.26 and 639.19

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Solution

The fourth proportional to 1,793.44, 2,690.26 and 639.19 is: 958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,793.44 : 2,690.26 = 639.19 : x
  2. Step 2: Convert to fraction form
    1,793.44/2,690.26 = 639.19/x
  3. Step 3: Cross multiply
    1,793.44x = 2,690.26 × 639.19
  4. Step 4: Simplify right side
    1,793.44x = 1,719,578.97
  5. Step 5: Solve for x
    x = 1,719,578.97/1,793.44
  6. Step 6: Final answer
    x = 958.82

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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.