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Finding the Third Proportional to 399,076.50 and 619,600.75

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Solution

The third proportional to 399,076.50 and 619,600.75 is: 961,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,076.50 : 619,600.75 = 619,600.75 : x
  2. Step 2: Convert to fraction form
    399,076.50/619,600.75 = 619,600.75/x
  3. Step 3: Cross multiply
    399,076.50x = 619,600.75 × 619,600.75
  4. Step 4: Simplify right side
    399,076.50x = 383,905,089,400.56
  5. Step 5: Solve for x
    x = 383,905,089,400.56/399,076.50
  6. Step 6: Final answer
    x = 961,983.70

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.