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Finding the Fourth Proportional to 331,321.60, 496,982.40 and 120,966.40

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Solution

The fourth proportional to 331,321.60, 496,982.40 and 120,966.40 is: 181,449.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,321.60 : 496,982.40 = 120,966.40 : x
  2. Step 2: Convert to fraction form
    331,321.60/496,982.40 = 120,966.40/x
  3. Step 3: Cross multiply
    331,321.60x = 496,982.40 × 120,966.40
  4. Step 4: Simplify right side
    331,321.60x = 60,118,171,791.36
  5. Step 5: Solve for x
    x = 60,118,171,791.36/331,321.60
  6. Step 6: Final answer
    x = 181,449.60

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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.