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Finding the Third Proportional to 207,438 and 320,371

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Solution

The third proportional to 207,438 and 320,371 is: 494,786.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,438 : 320,371 = 320,371 : x
  2. Step 2: Convert to fraction form
    207,438/320,371 = 320,371/x
  3. Step 3: Cross multiply
    207,438x = 320,371 × 320,371
  4. Step 4: Simplify right side
    207,438x = 102,637,577,641
  5. Step 5: Solve for x
    x = 102,637,577,641/207,438
  6. Step 6: Final answer
    x = 494,786.77

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.