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Finding the Third Proportional to 213,482 and 321,621

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Solution

The third proportional to 213,482 and 321,621 is: 484,537.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,482 : 321,621 = 321,621 : x
  2. Step 2: Convert to fraction form
    213,482/321,621 = 321,621/x
  3. Step 3: Cross multiply
    213,482x = 321,621 × 321,621
  4. Step 4: Simplify right side
    213,482x = 103,440,067,641
  5. Step 5: Solve for x
    x = 103,440,067,641/213,482
  6. Step 6: Final answer
    x = 484,537.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.