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Finding the Fourth Proportional to 512,363.80, 768,545.70 and 179,939.80

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Solution

The fourth proportional to 512,363.80, 768,545.70 and 179,939.80 is: 269,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,363.80 : 768,545.70 = 179,939.80 : x
  2. Step 2: Convert to fraction form
    512,363.80/768,545.70 = 179,939.80/x
  3. Step 3: Cross multiply
    512,363.80x = 768,545.70 × 179,939.80
  4. Step 4: Simplify right side
    512,363.80x = 138,291,959,548.86
  5. Step 5: Solve for x
    x = 138,291,959,548.86/512,363.80
  6. Step 6: Final answer
    x = 269,909.70

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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.