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Finding the Third Proportional to 916 and 2,153

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Solution

The third proportional to 916 and 2,153 is: 5,060.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    916 : 2,153 = 2,153 : x
  2. Step 2: Convert to fraction form
    916/2,153 = 2,153/x
  3. Step 3: Cross multiply
    916x = 2,153 × 2,153
  4. Step 4: Simplify right side
    916x = 4,635,409
  5. Step 5: Solve for x
    x = 4,635,409/916
  6. Step 6: Final answer
    x = 5,060.49

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.