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Finding the Fourth Proportional to 331,277.80, 496,331.10 and 320,314.60

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Solution

The fourth proportional to 331,277.80, 496,331.10 and 320,314.60 is: 479,905.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,277.80 : 496,331.10 = 320,314.60 : x
  2. Step 2: Convert to fraction form
    331,277.80/496,331.10 = 320,314.60/x
  3. Step 3: Cross multiply
    331,277.80x = 496,331.10 × 320,314.60
  4. Step 4: Simplify right side
    331,277.80x = 158,982,097,764.06
  5. Step 5: Solve for x
    x = 158,982,097,764.06/331,277.80
  6. Step 6: Final answer
    x = 479,905.68

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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.