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Finding the Fourth Proportional to 330,617.80, 495,926.70 and 81,299.80

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Solution

The fourth proportional to 330,617.80, 495,926.70 and 81,299.80 is: 121,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,617.80 : 495,926.70 = 81,299.80 : x
  2. Step 2: Convert to fraction form
    330,617.80/495,926.70 = 81,299.80/x
  3. Step 3: Cross multiply
    330,617.80x = 495,926.70 × 81,299.80
  4. Step 4: Simplify right side
    330,617.80x = 40,318,741,524.66
  5. Step 5: Solve for x
    x = 40,318,741,524.66/330,617.80
  6. Step 6: Final answer
    x = 121,949.70

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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.