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Finding the Fourth Proportional to 323,814.80, 485,722.20 and 205,716.80

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Solution

The fourth proportional to 323,814.80, 485,722.20 and 205,716.80 is: 308,575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,814.80 : 485,722.20 = 205,716.80 : x
  2. Step 2: Convert to fraction form
    323,814.80/485,722.20 = 205,716.80/x
  3. Step 3: Cross multiply
    323,814.80x = 485,722.20 × 205,716.80
  4. Step 4: Simplify right side
    323,814.80x = 99,921,216,672.96
  5. Step 5: Solve for x
    x = 99,921,216,672.96/323,814.80
  6. Step 6: Final answer
    x = 308,575.20

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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.