Home / 398,977,687.20-597,458,761.20-261,921,021.60

Finding the Fourth Proportional to 398,977,687.20, 597,458,761.20 and 261,921,021.60

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Solution

The fourth proportional to 398,977,687.20, 597,458,761.20 and 261,921,021.60 is: 392,219,951.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,977,687.20 : 597,458,761.20 = 261,921,021.60 : x
  2. Step 2: Convert to fraction form
    398,977,687.20/597,458,761.20 = 261,921,021.60/x
  3. Step 3: Cross multiply
    398,977,687.20x = 597,458,761.20 × 261,921,021.60
  4. Step 4: Simplify right side
    398,977,687.20x = 156,487,009,097,374,464
  5. Step 5: Solve for x
    x = 156,487,009,097,374,464/398,977,687.20
  6. Step 6: Final answer
    x = 392,219,951.44

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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.