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Finding the Third Proportional to 794 and 1,140

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Solution

The third proportional to 794 and 1,140 is: 1,636.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    794 : 1,140 = 1,140 : x
  2. Step 2: Convert to fraction form
    794/1,140 = 1,140/x
  3. Step 3: Cross multiply
    794x = 1,140 × 1,140
  4. Step 4: Simplify right side
    794x = 1,299,600
  5. Step 5: Solve for x
    x = 1,299,600/794
  6. Step 6: Final answer
    x = 1,636.78

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.