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Finding the Third Proportional to 1,379 and 1,619

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Solution

The third proportional to 1,379 and 1,619 is: 1,900.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379 : 1,619 = 1,619 : x
  2. Step 2: Convert to fraction form
    1,379/1,619 = 1,619/x
  3. Step 3: Cross multiply
    1,379x = 1,619 × 1,619
  4. Step 4: Simplify right side
    1,379x = 2,621,161
  5. Step 5: Solve for x
    x = 2,621,161/1,379
  6. Step 6: Final answer
    x = 1,900.77

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.