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Finding the Fourth Proportional to 644,052.60, 965,694.90 and 394,913.40

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Solution

The fourth proportional to 644,052.60, 965,694.90 and 394,913.40 is: 592,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,052.60 : 965,694.90 = 394,913.40 : x
  2. Step 2: Convert to fraction form
    644,052.60/965,694.90 = 394,913.40/x
  3. Step 3: Cross multiply
    644,052.60x = 965,694.90 × 394,913.40
  4. Step 4: Simplify right side
    644,052.60x = 381,365,856,321.66
  5. Step 5: Solve for x
    x = 381,365,856,321.66/644,052.60
  6. Step 6: Final answer
    x = 592,134.64

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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.