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Finding the Fourth Proportional to 664,405,221.60, 996,782,014.80 and 255,474,712.80

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Solution

The fourth proportional to 664,405,221.60, 996,782,014.80 and 255,474,712.80 is: 383,279,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,405,221.60 : 996,782,014.80 = 255,474,712.80 : x
  2. Step 2: Convert to fraction form
    664,405,221.60/996,782,014.80 = 255,474,712.80/x
  3. Step 3: Cross multiply
    664,405,221.60x = 996,782,014.80 × 255,474,712.80
  4. Step 4: Simplify right side
    664,405,221.60x = 254,652,598,955,235,360
  5. Step 5: Solve for x
    x = 254,652,598,955,235,360/664,405,221.60
  6. Step 6: Final answer
    x = 383,279,045.19

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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.