Home / 419,905,999.20-629,858,998.80-236,239,989.60

Finding the Fourth Proportional to 419,905,999.20, 629,858,998.80 and 236,239,989.60

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Solution

The fourth proportional to 419,905,999.20, 629,858,998.80 and 236,239,989.60 is: 354,359,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,999.20 : 629,858,998.80 = 236,239,989.60 : x
  2. Step 2: Convert to fraction form
    419,905,999.20/629,858,998.80 = 236,239,989.60/x
  3. Step 3: Cross multiply
    419,905,999.20x = 629,858,998.80 × 236,239,989.60
  4. Step 4: Simplify right side
    419,905,999.20x = 148,797,883,325,978,400
  5. Step 5: Solve for x
    x = 148,797,883,325,978,400/419,905,999.20
  6. Step 6: Final answer
    x = 354,359,984.40

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1.5x scale

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.