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Finding the Fourth Proportional to 330,070.20, 495,105.30 and 307,951.80

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Solution

The fourth proportional to 330,070.20, 495,105.30 and 307,951.80 is: 461,927.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,070.20 : 495,105.30 = 307,951.80 : x
  2. Step 2: Convert to fraction form
    330,070.20/495,105.30 = 307,951.80/x
  3. Step 3: Cross multiply
    330,070.20x = 495,105.30 × 307,951.80
  4. Step 4: Simplify right side
    330,070.20x = 152,468,568,324.54
  5. Step 5: Solve for x
    x = 152,468,568,324.54/330,070.20
  6. Step 6: Final answer
    x = 461,927.70

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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.