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Finding the Third Proportional to 934.50 and 2,138

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Solution

The third proportional to 934.50 and 2,138 is: 4,891.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.50 : 2,138 = 2,138 : x
  2. Step 2: Convert to fraction form
    934.50/2,138 = 2,138/x
  3. Step 3: Cross multiply
    934.50x = 2,138 × 2,138
  4. Step 4: Simplify right side
    934.50x = 4,571,044
  5. Step 5: Solve for x
    x = 4,571,044/934.50
  6. Step 6: Final answer
    x = 4,891.43

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.