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Finding the Fourth Proportional to 372,198.36, 513,767.34 and 221,295

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Solution

The fourth proportional to 372,198.36, 513,767.34 and 221,295 is: 305,466.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,198.36 : 513,767.34 = 221,295 : x
  2. Step 2: Convert to fraction form
    372,198.36/513,767.34 = 221,295/x
  3. Step 3: Cross multiply
    372,198.36x = 513,767.34 × 221,295
  4. Step 4: Simplify right side
    372,198.36x = 113,694,143,505.30
  5. Step 5: Solve for x
    x = 113,694,143,505.30/372,198.36
  6. Step 6: Final answer
    x = 305,466.54

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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.