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Finding the Fourth Proportional to 330,771.40, 496,286.70 and 131,057.80

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Solution

The fourth proportional to 330,771.40, 496,286.70 and 131,057.80 is: 196,638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,771.40 : 496,286.70 = 131,057.80 : x
  2. Step 2: Convert to fraction form
    330,771.40/496,286.70 = 131,057.80/x
  3. Step 3: Cross multiply
    330,771.40x = 496,286.70 × 131,057.80
  4. Step 4: Simplify right side
    330,771.40x = 65,042,243,071.26
  5. Step 5: Solve for x
    x = 65,042,243,071.26/330,771.40
  6. Step 6: Final answer
    x = 196,638.05

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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.