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Finding the Fourth Proportional to 323,646.58, 485,417.85 and 136,633.78

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Solution

The fourth proportional to 323,646.58, 485,417.85 and 136,633.78 is: 204,928.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,646.58 : 485,417.85 = 136,633.78 : x
  2. Step 2: Convert to fraction form
    323,646.58/485,417.85 = 136,633.78/x
  3. Step 3: Cross multiply
    323,646.58x = 485,417.85 × 136,633.78
  4. Step 4: Simplify right side
    323,646.58x = 66,324,475,724.97
  5. Step 5: Solve for x
    x = 66,324,475,724.97/323,646.58
  6. Step 6: Final answer
    x = 204,928.71

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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.