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Finding the Fourth Proportional to 663,138.80, 995,002.22 and 347,520.68

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Solution

The fourth proportional to 663,138.80, 995,002.22 and 347,520.68 is: 521,435.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,138.80 : 995,002.22 = 347,520.68 : x
  2. Step 2: Convert to fraction form
    663,138.80/995,002.22 = 347,520.68/x
  3. Step 3: Cross multiply
    663,138.80x = 995,002.22 × 347,520.68
  4. Step 4: Simplify right side
    663,138.80x = 345,783,848,095.91
  5. Step 5: Solve for x
    x = 345,783,848,095.91/663,138.80
  6. Step 6: Final answer
    x = 521,435.10

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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.