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Finding the Fourth Proportional to 1,863.70, 2,793.01 and 939.90

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Solution

The fourth proportional to 1,863.70, 2,793.01 and 939.90 is: 1,408.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.70 : 2,793.01 = 939.90 : x
  2. Step 2: Convert to fraction form
    1,863.70/2,793.01 = 939.90/x
  3. Step 3: Cross multiply
    1,863.70x = 2,793.01 × 939.90
  4. Step 4: Simplify right side
    1,863.70x = 2,625,150.10
  5. Step 5: Solve for x
    x = 2,625,150.10/1,863.70
  6. Step 6: Final answer
    x = 1,408.57

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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.