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Finding the Third Proportional to 916 and 1,975

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Solution

The third proportional to 916 and 1,975 is: 4,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    916 : 1,975 = 1,975 : x
  2. Step 2: Convert to fraction form
    916/1,975 = 1,975/x
  3. Step 3: Cross multiply
    916x = 1,975 × 1,975
  4. Step 4: Simplify right side
    916x = 3,900,625
  5. Step 5: Solve for x
    x = 3,900,625/916
  6. Step 6: Final answer
    x = 4,258.32

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.