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Finding the Third Proportional to 312,908 and 672,989

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Solution

The third proportional to 312,908 and 672,989 is: 1,447,435.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,908 : 672,989 = 672,989 : x
  2. Step 2: Convert to fraction form
    312,908/672,989 = 672,989/x
  3. Step 3: Cross multiply
    312,908x = 672,989 × 672,989
  4. Step 4: Simplify right side
    312,908x = 452,914,194,121
  5. Step 5: Solve for x
    x = 452,914,194,121/312,908
  6. Step 6: Final answer
    x = 1,447,435.65

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.