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Finding the Fourth Proportional to 664,009,858.70, 996,014,788.05 and 203,947,289.90

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Solution

The fourth proportional to 664,009,858.70, 996,014,788.05 and 203,947,289.90 is: 305,920,934.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,009,858.70 : 996,014,788.05 = 203,947,289.90 : x
  2. Step 2: Convert to fraction form
    664,009,858.70/996,014,788.05 = 203,947,289.90/x
  3. Step 3: Cross multiply
    664,009,858.70x = 996,014,788.05 × 203,947,289.90
  4. Step 4: Simplify right side
    664,009,858.70x = 203,134,516,723,120,416
  5. Step 5: Solve for x
    x = 203,134,516,723,120,416/664,009,858.70
  6. Step 6: Final answer
    x = 305,920,934.85

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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.