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Finding the Third Proportional to 263,378 and 418,395

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Solution

The third proportional to 263,378 and 418,395 is: 664,650.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,378 : 418,395 = 418,395 : x
  2. Step 2: Convert to fraction form
    263,378/418,395 = 418,395/x
  3. Step 3: Cross multiply
    263,378x = 418,395 × 418,395
  4. Step 4: Simplify right side
    263,378x = 175,054,376,025
  5. Step 5: Solve for x
    x = 175,054,376,025/263,378
  6. Step 6: Final answer
    x = 664,650.72

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.