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Finding the Fourth Proportional to 331,057.20, 496,585.80 and 305,137.20

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Solution

The fourth proportional to 331,057.20, 496,585.80 and 305,137.20 is: 457,705.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,057.20 : 496,585.80 = 305,137.20 : x
  2. Step 2: Convert to fraction form
    331,057.20/496,585.80 = 305,137.20/x
  3. Step 3: Cross multiply
    331,057.20x = 496,585.80 × 305,137.20
  4. Step 4: Simplify right side
    331,057.20x = 151,526,800,571.76
  5. Step 5: Solve for x
    x = 151,526,800,571.76/331,057.20
  6. Step 6: Final answer
    x = 457,705.80

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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.