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Finding the Third Proportional to 2,139 and 2,607

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Solution

The third proportional to 2,139 and 2,607 is: 3,177.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139 : 2,607 = 2,607 : x
  2. Step 2: Convert to fraction form
    2,139/2,607 = 2,607/x
  3. Step 3: Cross multiply
    2,139x = 2,607 × 2,607
  4. Step 4: Simplify right side
    2,139x = 6,796,449
  5. Step 5: Solve for x
    x = 6,796,449/2,139
  6. Step 6: Final answer
    x = 3,177.40

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.