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Finding the Third Proportional to 210,186 and 320,139

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Solution

The third proportional to 210,186 and 320,139 is: 487,610.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,186 : 320,139 = 320,139 : x
  2. Step 2: Convert to fraction form
    210,186/320,139 = 320,139/x
  3. Step 3: Cross multiply
    210,186x = 320,139 × 320,139
  4. Step 4: Simplify right side
    210,186x = 102,488,979,321
  5. Step 5: Solve for x
    x = 102,488,979,321/210,186
  6. Step 6: Final answer
    x = 487,610.87

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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.