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Finding the Third Proportional to 916 and 1,168

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Solution

The third proportional to 916 and 1,168 is: 1,489.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    916 : 1,168 = 1,168 : x
  2. Step 2: Convert to fraction form
    916/1,168 = 1,168/x
  3. Step 3: Cross multiply
    916x = 1,168 × 1,168
  4. Step 4: Simplify right side
    916x = 1,364,224
  5. Step 5: Solve for x
    x = 1,364,224/916
  6. Step 6: Final answer
    x = 1,489.33

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.