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Finding the Third Proportional to 138,646 and 210,887

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Solution

The third proportional to 138,646 and 210,887 is: 320,768.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,646 : 210,887 = 210,887 : x
  2. Step 2: Convert to fraction form
    138,646/210,887 = 210,887/x
  3. Step 3: Cross multiply
    138,646x = 210,887 × 210,887
  4. Step 4: Simplify right side
    138,646x = 44,473,326,769
  5. Step 5: Solve for x
    x = 44,473,326,769/138,646
  6. Step 6: Final answer
    x = 320,768.91

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.