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Finding the Third Proportional to 207,473 and 320,420

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Solution

The third proportional to 207,473 and 320,420 is: 494,854.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,473 : 320,420 = 320,420 : x
  2. Step 2: Convert to fraction form
    207,473/320,420 = 320,420/x
  3. Step 3: Cross multiply
    207,473x = 320,420 × 320,420
  4. Step 4: Simplify right side
    207,473x = 102,668,976,400
  5. Step 5: Solve for x
    x = 102,668,976,400/207,473
  6. Step 6: Final answer
    x = 494,854.64

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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.