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Finding the Third Proportional to 308,922 and 721,730

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Solution

The third proportional to 308,922 and 721,730 is: 1,686,167.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,922 : 721,730 = 721,730 : x
  2. Step 2: Convert to fraction form
    308,922/721,730 = 721,730/x
  3. Step 3: Cross multiply
    308,922x = 721,730 × 721,730
  4. Step 4: Simplify right side
    308,922x = 520,894,192,900
  5. Step 5: Solve for x
    x = 520,894,192,900/308,922
  6. Step 6: Final answer
    x = 1,686,167.36

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.