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Finding the Fourth Proportional to 330,827.80, 495,998.70 and 131,049.40

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Solution

The fourth proportional to 330,827.80, 495,998.70 and 131,049.40 is: 196,477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,827.80 : 495,998.70 = 131,049.40 : x
  2. Step 2: Convert to fraction form
    330,827.80/495,998.70 = 131,049.40/x
  3. Step 3: Cross multiply
    330,827.80x = 495,998.70 × 131,049.40
  4. Step 4: Simplify right side
    330,827.80x = 65,000,332,035.78
  5. Step 5: Solve for x
    x = 65,000,332,035.78/330,827.80
  6. Step 6: Final answer
    x = 196,477.84

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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.