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Finding the Fourth Proportional to 408,848,261.80, 613,272,392.70 and 245,589,586.60

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Solution

The fourth proportional to 408,848,261.80, 613,272,392.70 and 245,589,586.60 is: 368,384,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,848,261.80 : 613,272,392.70 = 245,589,586.60 : x
  2. Step 2: Convert to fraction form
    408,848,261.80/613,272,392.70 = 245,589,586.60/x
  3. Step 3: Cross multiply
    408,848,261.80x = 613,272,392.70 × 245,589,586.60
  4. Step 4: Simplify right side
    408,848,261.80x = 150,613,313,396,385,856
  5. Step 5: Solve for x
    x = 150,613,313,396,385,856/408,848,261.80
  6. Step 6: Final answer
    x = 368,384,379.90

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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.