Home / 391,022.97-539,620.02-221,257.10

Finding the Fourth Proportional to 391,022.97, 539,620.02 and 221,257.10

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Solution

The fourth proportional to 391,022.97, 539,620.02 and 221,257.10 is: 305,339.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,022.97 : 539,620.02 = 221,257.10 : x
  2. Step 2: Convert to fraction form
    391,022.97/539,620.02 = 221,257.10/x
  3. Step 3: Cross multiply
    391,022.97x = 539,620.02 × 221,257.10
  4. Step 4: Simplify right side
    391,022.97x = 119,394,760,727.14
  5. Step 5: Solve for x
    x = 119,394,760,727.14/391,022.97
  6. Step 6: Final answer
    x = 305,339.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.