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Finding the Third Proportional to 793 and 1,231.50

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Solution

The third proportional to 793 and 1,231.50 is: 1,912.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    793 : 1,231.50 = 1,231.50 : x
  2. Step 2: Convert to fraction form
    793/1,231.50 = 1,231.50/x
  3. Step 3: Cross multiply
    793x = 1,231.50 × 1,231.50
  4. Step 4: Simplify right side
    793x = 1,516,592.25
  5. Step 5: Solve for x
    x = 1,516,592.25/793
  6. Step 6: Final answer
    x = 1,912.47

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.