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Finding the Third Proportional to 321,039 and 497,790

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Solution

The third proportional to 321,039 and 497,790 is: 771,852.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,039 : 497,790 = 497,790 : x
  2. Step 2: Convert to fraction form
    321,039/497,790 = 497,790/x
  3. Step 3: Cross multiply
    321,039x = 497,790 × 497,790
  4. Step 4: Simplify right side
    321,039x = 247,794,884,100
  5. Step 5: Solve for x
    x = 247,794,884,100/321,039
  6. Step 6: Final answer
    x = 771,852.90

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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.