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Finding the Third Proportional to 721,636 and 1,121,730

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Solution

The third proportional to 721,636 and 1,121,730 is: 1,743,646.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,636 : 1,121,730 = 1,121,730 : x
  2. Step 2: Convert to fraction form
    721,636/1,121,730 = 1,121,730/x
  3. Step 3: Cross multiply
    721,636x = 1,121,730 × 1,121,730
  4. Step 4: Simplify right side
    721,636x = 1,258,278,192,900
  5. Step 5: Solve for x
    x = 1,258,278,192,900/721,636
  6. Step 6: Final answer
    x = 1,743,646.65

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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.