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Finding the Third Proportional to 419,328 and 558,668

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Solution

The third proportional to 419,328 and 558,668 is: 744,309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,328 : 558,668 = 558,668 : x
  2. Step 2: Convert to fraction form
    419,328/558,668 = 558,668/x
  3. Step 3: Cross multiply
    419,328x = 558,668 × 558,668
  4. Step 4: Simplify right side
    419,328x = 312,109,934,224
  5. Step 5: Solve for x
    x = 312,109,934,224/419,328
  6. Step 6: Final answer
    x = 744,309.79

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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.