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Finding the Third Proportional to 391,351.50 and 558,319.50

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Solution

The third proportional to 391,351.50 and 558,319.50 is: 796,523.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,351.50 : 558,319.50 = 558,319.50 : x
  2. Step 2: Convert to fraction form
    391,351.50/558,319.50 = 558,319.50/x
  3. Step 3: Cross multiply
    391,351.50x = 558,319.50 × 558,319.50
  4. Step 4: Simplify right side
    391,351.50x = 311,720,664,080.25
  5. Step 5: Solve for x
    x = 311,720,664,080.25/391,351.50
  6. Step 6: Final answer
    x = 796,523.49

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.