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Finding the Third Proportional to 140,990 and 305,212

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Solution

The third proportional to 140,990 and 305,212 is: 660,716.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,990 : 305,212 = 305,212 : x
  2. Step 2: Convert to fraction form
    140,990/305,212 = 305,212/x
  3. Step 3: Cross multiply
    140,990x = 305,212 × 305,212
  4. Step 4: Simplify right side
    140,990x = 93,154,364,944
  5. Step 5: Solve for x
    x = 93,154,364,944/140,990
  6. Step 6: Final answer
    x = 660,716.11

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.