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Finding the Third Proportional to 926.50 and 1,387

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Solution

The third proportional to 926.50 and 1,387 is: 2,076.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.50 : 1,387 = 1,387 : x
  2. Step 2: Convert to fraction form
    926.50/1,387 = 1,387/x
  3. Step 3: Cross multiply
    926.50x = 1,387 × 1,387
  4. Step 4: Simplify right side
    926.50x = 1,923,769
  5. Step 5: Solve for x
    x = 1,923,769/926.50
  6. Step 6: Final answer
    x = 2,076.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.