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Finding the Fourth Proportional to 323,630.20, 485,186.10 and 136,487.80

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Solution

The fourth proportional to 323,630.20, 485,186.10 and 136,487.80 is: 204,622.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,630.20 : 485,186.10 = 136,487.80 : x
  2. Step 2: Convert to fraction form
    323,630.20/485,186.10 = 136,487.80/x
  3. Step 3: Cross multiply
    323,630.20x = 485,186.10 × 136,487.80
  4. Step 4: Simplify right side
    323,630.20x = 66,221,983,379.58
  5. Step 5: Solve for x
    x = 66,221,983,379.58/323,630.20
  6. Step 6: Final answer
    x = 204,622.38

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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.