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Finding the Third Proportional to 135,387 and 210,320

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Solution

The third proportional to 135,387 and 210,320 is: 326,726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,387 : 210,320 = 210,320 : x
  2. Step 2: Convert to fraction form
    135,387/210,320 = 210,320/x
  3. Step 3: Cross multiply
    135,387x = 210,320 × 210,320
  4. Step 4: Simplify right side
    135,387x = 44,234,502,400
  5. Step 5: Solve for x
    x = 44,234,502,400/135,387
  6. Step 6: Final answer
    x = 326,726.37

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.