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Finding the Third Proportional to 380 and 727

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Solution

The third proportional to 380 and 727 is: 1,390.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    380 : 727 = 727 : x
  2. Step 2: Convert to fraction form
    380/727 = 727/x
  3. Step 3: Cross multiply
    380x = 727 × 727
  4. Step 4: Simplify right side
    380x = 528,529
  5. Step 5: Solve for x
    x = 528,529/380
  6. Step 6: Final answer
    x = 1,390.87

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.