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Finding the Fourth Proportional to 218,652.33, 328,004.78 and 206,694.91

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Solution

The fourth proportional to 218,652.33, 328,004.78 and 206,694.91 is: 310,067.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,652.33 : 328,004.78 = 206,694.91 : x
  2. Step 2: Convert to fraction form
    218,652.33/328,004.78 = 206,694.91/x
  3. Step 3: Cross multiply
    218,652.33x = 328,004.78 × 206,694.91
  4. Step 4: Simplify right side
    218,652.33x = 67,796,918,481.67
  5. Step 5: Solve for x
    x = 67,796,918,481.67/218,652.33
  6. Step 6: Final answer
    x = 310,067.21

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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.