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Finding the Third Proportional to 378,930 and 810,378

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Solution

The third proportional to 378,930 and 810,378 is: 1,733,070.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,930 : 810,378 = 810,378 : x
  2. Step 2: Convert to fraction form
    378,930/810,378 = 810,378/x
  3. Step 3: Cross multiply
    378,930x = 810,378 × 810,378
  4. Step 4: Simplify right side
    378,930x = 656,712,502,884
  5. Step 5: Solve for x
    x = 656,712,502,884/378,930
  6. Step 6: Final answer
    x = 1,733,070.76

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.