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Finding the Third Proportional to 392,318 and 831,715

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Solution

The third proportional to 392,318 and 831,715 is: 1,763,237.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,318 : 831,715 = 831,715 : x
  2. Step 2: Convert to fraction form
    392,318/831,715 = 831,715/x
  3. Step 3: Cross multiply
    392,318x = 831,715 × 831,715
  4. Step 4: Simplify right side
    392,318x = 691,749,841,225
  5. Step 5: Solve for x
    x = 691,749,841,225/392,318
  6. Step 6: Final answer
    x = 1,763,237.58

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.