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Finding the Fourth Proportional to 394,978.88, 545,084.87 and 222,938.73

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Solution

The fourth proportional to 394,978.88, 545,084.87 and 222,938.73 is: 307,663.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,978.88 : 545,084.87 = 222,938.73 : x
  2. Step 2: Convert to fraction form
    394,978.88/545,084.87 = 222,938.73/x
  3. Step 3: Cross multiply
    394,978.88x = 545,084.87 × 222,938.73
  4. Step 4: Simplify right side
    394,978.88x = 121,520,528,660.02
  5. Step 5: Solve for x
    x = 121,520,528,660.02/394,978.88
  6. Step 6: Final answer
    x = 307,663.36

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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.