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Finding the Third Proportional to 399,028 and 875,660

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Solution

The third proportional to 399,028 and 875,660 is: 1,921,620.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,028 : 875,660 = 875,660 : x
  2. Step 2: Convert to fraction form
    399,028/875,660 = 875,660/x
  3. Step 3: Cross multiply
    399,028x = 875,660 × 875,660
  4. Step 4: Simplify right side
    399,028x = 766,780,435,600
  5. Step 5: Solve for x
    x = 766,780,435,600/399,028
  6. Step 6: Final answer
    x = 1,921,620.63

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.