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Finding the Third Proportional to 262,378 and 393,759

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Solution

The third proportional to 262,378 and 393,759 is: 590,926.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,378 : 393,759 = 393,759 : x
  2. Step 2: Convert to fraction form
    262,378/393,759 = 393,759/x
  3. Step 3: Cross multiply
    262,378x = 393,759 × 393,759
  4. Step 4: Simplify right side
    262,378x = 155,046,150,081
  5. Step 5: Solve for x
    x = 155,046,150,081/262,378
  6. Step 6: Final answer
    x = 590,926.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.