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Finding the Fourth Proportional to 323,629.20, 485,184.60 and 136,486.80

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Solution

The fourth proportional to 323,629.20, 485,184.60 and 136,486.80 is: 204,620.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,629.20 : 485,184.60 = 136,486.80 : x
  2. Step 2: Convert to fraction form
    323,629.20/485,184.60 = 136,486.80/x
  3. Step 3: Cross multiply
    323,629.20x = 485,184.60 × 136,486.80
  4. Step 4: Simplify right side
    323,629.20x = 66,221,293,463.28
  5. Step 5: Solve for x
    x = 66,221,293,463.28/323,629.20
  6. Step 6: Final answer
    x = 204,620.89

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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.