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Finding the Third Proportional to 533 and 1,129

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Solution

The third proportional to 533 and 1,129 is: 2,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    533 : 1,129 = 1,129 : x
  2. Step 2: Convert to fraction form
    533/1,129 = 1,129/x
  3. Step 3: Cross multiply
    533x = 1,129 × 1,129
  4. Step 4: Simplify right side
    533x = 1,274,641
  5. Step 5: Solve for x
    x = 1,274,641/533
  6. Step 6: Final answer
    x = 2,391.45

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.