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Finding the Third Proportional to 399,510 and 855,881

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Solution

The third proportional to 399,510 and 855,881 is: 1,833,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,510 : 855,881 = 855,881 : x
  2. Step 2: Convert to fraction form
    399,510/855,881 = 855,881/x
  3. Step 3: Cross multiply
    399,510x = 855,881 × 855,881
  4. Step 4: Simplify right side
    399,510x = 732,532,286,161
  5. Step 5: Solve for x
    x = 732,532,286,161/399,510
  6. Step 6: Final answer
    x = 1,833,576.85

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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.