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Finding the Third Proportional to 687,832 and 917,355

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Solution

The third proportional to 687,832 and 917,355 is: 1,223,467.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,832 : 917,355 = 917,355 : x
  2. Step 2: Convert to fraction form
    687,832/917,355 = 917,355/x
  3. Step 3: Cross multiply
    687,832x = 917,355 × 917,355
  4. Step 4: Simplify right side
    687,832x = 841,540,196,025
  5. Step 5: Solve for x
    x = 841,540,196,025/687,832
  6. Step 6: Final answer
    x = 1,223,467.64

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.