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Finding the Fourth Proportional to 389,991.44, 538,184.04 and 220,215.44

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Solution

The fourth proportional to 389,991.44, 538,184.04 and 220,215.44 is: 303,894.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,991.44 : 538,184.04 = 220,215.44 : x
  2. Step 2: Convert to fraction form
    389,991.44/538,184.04 = 220,215.44/x
  3. Step 3: Cross multiply
    389,991.44x = 538,184.04 × 220,215.44
  4. Step 4: Simplify right side
    389,991.44x = 118,516,435,169.58
  5. Step 5: Solve for x
    x = 118,516,435,169.58/389,991.44
  6. Step 6: Final answer
    x = 303,894.97

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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.