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Finding the Third Proportional to 1,728 and 4,644

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Solution

The third proportional to 1,728 and 4,644 is: 12,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728 : 4,644 = 4,644 : x
  2. Step 2: Convert to fraction form
    1,728/4,644 = 4,644/x
  3. Step 3: Cross multiply
    1,728x = 4,644 × 4,644
  4. Step 4: Simplify right side
    1,728x = 21,566,736
  5. Step 5: Solve for x
    x = 21,566,736/1,728
  6. Step 6: Final answer
    x = 12,480.75

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Why These Related Problems?

These problems maintain the same ratio (2.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.