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Finding the Third Proportional to 391,685.63 and 622,520.44

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Solution

The third proportional to 391,685.63 and 622,520.44 is: 989,394.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,685.63 : 622,520.44 = 622,520.44 : x
  2. Step 2: Convert to fraction form
    391,685.63/622,520.44 = 622,520.44/x
  3. Step 3: Cross multiply
    391,685.63x = 622,520.44 × 622,520.44
  4. Step 4: Simplify right side
    391,685.63x = 387,531,695,105.19
  5. Step 5: Solve for x
    x = 387,531,695,105.19/391,685.63
  6. Step 6: Final answer
    x = 989,394.73

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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.