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Finding the Third Proportional to 407,878 and 874,786

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Solution

The third proportional to 407,878 and 874,786 is: 1,876,175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,878 : 874,786 = 874,786 : x
  2. Step 2: Convert to fraction form
    407,878/874,786 = 874,786/x
  3. Step 3: Cross multiply
    407,878x = 874,786 × 874,786
  4. Step 4: Simplify right side
    407,878x = 765,250,545,796
  5. Step 5: Solve for x
    x = 765,250,545,796/407,878
  6. Step 6: Final answer
    x = 1,876,175.10

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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.