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Finding the Fourth Proportional to 394,780.90, 544,790.85 and 222,699.23

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Solution

The fourth proportional to 394,780.90, 544,790.85 and 222,699.23 is: 307,321.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,780.90 : 544,790.85 = 222,699.23 : x
  2. Step 2: Convert to fraction form
    394,780.90/544,790.85 = 222,699.23/x
  3. Step 3: Cross multiply
    394,780.90x = 544,790.85 × 222,699.23
  4. Step 4: Simplify right side
    394,780.90x = 121,324,502,806.05
  5. Step 5: Solve for x
    x = 121,324,502,806.05/394,780.90
  6. Step 6: Final answer
    x = 307,321.11

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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.