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Finding the Fourth Proportional to 331,310.40, 496,965.60 and 242,080.80

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Solution

The fourth proportional to 331,310.40, 496,965.60 and 242,080.80 is: 363,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,310.40 : 496,965.60 = 242,080.80 : x
  2. Step 2: Convert to fraction form
    331,310.40/496,965.60 = 242,080.80/x
  3. Step 3: Cross multiply
    331,310.40x = 496,965.60 × 242,080.80
  4. Step 4: Simplify right side
    331,310.40x = 120,305,830,020.48
  5. Step 5: Solve for x
    x = 120,305,830,020.48/331,310.40
  6. Step 6: Final answer
    x = 363,121.20

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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.