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Finding the Fourth Proportional to 389,992.44, 538,185.42 and 220,216.44

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Solution

The fourth proportional to 389,992.44, 538,185.42 and 220,216.44 is: 303,896.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,992.44 : 538,185.42 = 220,216.44 : x
  2. Step 2: Convert to fraction form
    389,992.44/538,185.42 = 220,216.44/x
  3. Step 3: Cross multiply
    389,992.44x = 538,185.42 × 220,216.44
  4. Step 4: Simplify right side
    389,992.44x = 118,517,277,252.31
  5. Step 5: Solve for x
    x = 118,517,277,252.31/389,992.44
  6. Step 6: Final answer
    x = 303,896.35

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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.