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Finding the Fourth Proportional to 1,944.27, 2,916.14 and 789.75

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Solution

The fourth proportional to 1,944.27, 2,916.14 and 789.75 is: 1,184.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,944.27 : 2,916.14 = 789.75 : x
  2. Step 2: Convert to fraction form
    1,944.27/2,916.14 = 789.75/x
  3. Step 3: Cross multiply
    1,944.27x = 2,916.14 × 789.75
  4. Step 4: Simplify right side
    1,944.27x = 2,303,017.62
  5. Step 5: Solve for x
    x = 2,303,017.62/1,944.27
  6. Step 6: Final answer
    x = 1,184.52

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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.