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Finding the Third Proportional to 789 and 1,944

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Solution

The third proportional to 789 and 1,944 is: 4,789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    789 : 1,944 = 1,944 : x
  2. Step 2: Convert to fraction form
    789/1,944 = 1,944/x
  3. Step 3: Cross multiply
    789x = 1,944 × 1,944
  4. Step 4: Simplify right side
    789x = 3,779,136
  5. Step 5: Solve for x
    x = 3,779,136/789
  6. Step 6: Final answer
    x = 4,789.78

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Why These Related Problems?

These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.