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Finding the Fourth Proportional to 418,786.60, 628,249.97 and 328,825.69

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Solution

The fourth proportional to 418,786.60, 628,249.97 and 328,825.69 is: 493,293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,786.60 : 628,249.97 = 328,825.69 : x
  2. Step 2: Convert to fraction form
    418,786.60/628,249.97 = 328,825.69/x
  3. Step 3: Cross multiply
    418,786.60x = 628,249.97 × 328,825.69
  4. Step 4: Simplify right side
    418,786.60x = 206,584,727,896.07
  5. Step 5: Solve for x
    x = 206,584,727,896.07/418,786.60
  6. Step 6: Final answer
    x = 493,293.55

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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.