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Finding the Third Proportional to 378,786 and 817,658

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Solution

The third proportional to 378,786 and 817,658 is: 1,765,019.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,786 : 817,658 = 817,658 : x
  2. Step 2: Convert to fraction form
    378,786/817,658 = 817,658/x
  3. Step 3: Cross multiply
    378,786x = 817,658 × 817,658
  4. Step 4: Simplify right side
    378,786x = 668,564,604,964
  5. Step 5: Solve for x
    x = 668,564,604,964/378,786
  6. Step 6: Final answer
    x = 1,765,019.31

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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.