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Finding the Fourth Proportional to 331,335.80, 496,418.10 and 320,372.60

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Solution

The fourth proportional to 331,335.80, 496,418.10 and 320,372.60 is: 479,992.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,335.80 : 496,418.10 = 320,372.60 : x
  2. Step 2: Convert to fraction form
    331,335.80/496,418.10 = 320,372.60/x
  3. Step 3: Cross multiply
    331,335.80x = 496,418.10 × 320,372.60
  4. Step 4: Simplify right side
    331,335.80x = 159,038,757,384.06
  5. Step 5: Solve for x
    x = 159,038,757,384.06/331,335.80
  6. Step 6: Final answer
    x = 479,992.68

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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.