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Finding the Fourth Proportional to 603,614,485.80, 905,421,728.70 and 408,469,350.60

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Solution

The fourth proportional to 603,614,485.80, 905,421,728.70 and 408,469,350.60 is: 612,704,025.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,614,485.80 : 905,421,728.70 = 408,469,350.60 : x
  2. Step 2: Convert to fraction form
    603,614,485.80/905,421,728.70 = 408,469,350.60/x
  3. Step 3: Cross multiply
    603,614,485.80x = 905,421,728.70 × 408,469,350.60
  4. Step 4: Simplify right side
    603,614,485.80x = 369,837,025,541,218,432
  5. Step 5: Solve for x
    x = 369,837,025,541,218,432/603,614,485.80
  6. Step 6: Final answer
    x = 612,704,025.90

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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.