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Finding the Fourth Proportional to 323,857.20, 485,008.20 and 261,649.20

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Solution

The fourth proportional to 323,857.20, 485,008.20 and 261,649.20 is: 391,845.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,857.20 : 485,008.20 = 261,649.20 : x
  2. Step 2: Convert to fraction form
    323,857.20/485,008.20 = 261,649.20/x
  3. Step 3: Cross multiply
    323,857.20x = 485,008.20 × 261,649.20
  4. Step 4: Simplify right side
    323,857.20x = 126,902,007,523.44
  5. Step 5: Solve for x
    x = 126,902,007,523.44/323,857.20
  6. Step 6: Final answer
    x = 391,845.57

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1.5x scale

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.