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Finding the Third Proportional to 644 and 1,364

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Solution

The third proportional to 644 and 1,364 is: 2,888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    644 : 1,364 = 1,364 : x
  2. Step 2: Convert to fraction form
    644/1,364 = 1,364/x
  3. Step 3: Cross multiply
    644x = 1,364 × 1,364
  4. Step 4: Simplify right side
    644x = 1,860,496
  5. Step 5: Solve for x
    x = 1,860,496/644
  6. Step 6: Final answer
    x = 2,888.97

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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.