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Finding the Fourth Proportional to 629,960.40, 944,335.80 and 209,019.60

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Solution

The fourth proportional to 629,960.40, 944,335.80 and 209,019.60 is: 313,328.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,960.40 : 944,335.80 = 209,019.60 : x
  2. Step 2: Convert to fraction form
    629,960.40/944,335.80 = 209,019.60/x
  3. Step 3: Cross multiply
    629,960.40x = 944,335.80 × 209,019.60
  4. Step 4: Simplify right side
    629,960.40x = 197,384,691,181.68
  5. Step 5: Solve for x
    x = 197,384,691,181.68/629,960.40
  6. Step 6: Final answer
    x = 313,328.73

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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.