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Finding the Third Proportional to 916 and 1,768

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Solution

The third proportional to 916 and 1,768 is: 3,412.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    916 : 1,768 = 1,768 : x
  2. Step 2: Convert to fraction form
    916/1,768 = 1,768/x
  3. Step 3: Cross multiply
    916x = 1,768 × 1,768
  4. Step 4: Simplify right side
    916x = 3,125,824
  5. Step 5: Solve for x
    x = 3,125,824/916
  6. Step 6: Final answer
    x = 3,412.47

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.