Home / 431,567,999.60-647,351,999.40-392,028,789.20

Finding the Fourth Proportional to 431,567,999.60, 647,351,999.40 and 392,028,789.20

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Solution

The fourth proportional to 431,567,999.60, 647,351,999.40 and 392,028,789.20 is: 588,043,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,567,999.60 : 647,351,999.40 = 392,028,789.20 : x
  2. Step 2: Convert to fraction form
    431,567,999.60/647,351,999.40 = 392,028,789.20/x
  3. Step 3: Cross multiply
    431,567,999.60x = 647,351,999.40 × 392,028,789.20
  4. Step 4: Simplify right side
    431,567,999.60x = 253,780,620,510,981,120
  5. Step 5: Solve for x
    x = 253,780,620,510,981,120/431,567,999.60
  6. Step 6: Final answer
    x = 588,043,183.80

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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.