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Finding the Fourth Proportional to 664,396,816.80, 996,296,626.80 and 255,317,008.80

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Solution

The fourth proportional to 664,396,816.80, 996,296,626.80 and 255,317,008.80 is: 382,860,766.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,396,816.80 : 996,296,626.80 = 255,317,008.80 : x
  2. Step 2: Convert to fraction form
    664,396,816.80/996,296,626.80 = 255,317,008.80/x
  3. Step 3: Cross multiply
    664,396,816.80x = 996,296,626.80 × 255,317,008.80
  4. Step 4: Simplify right side
    664,396,816.80x = 254,371,474,632,105,920
  5. Step 5: Solve for x
    x = 254,371,474,632,105,920/664,396,816.80
  6. Step 6: Final answer
    x = 382,860,766.64

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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.