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Finding the Fourth Proportional to 394,830.72, 544,866.39 and 213,542.66

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Solution

The fourth proportional to 394,830.72, 544,866.39 and 213,542.66 is: 294,688.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,830.72 : 544,866.39 = 213,542.66 : x
  2. Step 2: Convert to fraction form
    394,830.72/544,866.39 = 213,542.66/x
  3. Step 3: Cross multiply
    394,830.72x = 544,866.39 × 213,542.66
  4. Step 4: Simplify right side
    394,830.72x = 116,352,215,540.87
  5. Step 5: Solve for x
    x = 116,352,215,540.87/394,830.72
  6. Step 6: Final answer
    x = 294,688.86

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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.