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Finding the Third Proportional to 395,420 and 869,560

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Solution

The third proportional to 395,420 and 869,560 is: 1,912,231.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,420 : 869,560 = 869,560 : x
  2. Step 2: Convert to fraction form
    395,420/869,560 = 869,560/x
  3. Step 3: Cross multiply
    395,420x = 869,560 × 869,560
  4. Step 4: Simplify right side
    395,420x = 756,134,593,600
  5. Step 5: Solve for x
    x = 756,134,593,600/395,420
  6. Step 6: Final answer
    x = 1,912,231.54

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.