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Finding the Fourth Proportional to 394,780.65, 544,790.50 and 222,698.98

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Solution

The fourth proportional to 394,780.65, 544,790.50 and 222,698.98 is: 307,320.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,780.65 : 544,790.50 = 222,698.98 : x
  2. Step 2: Convert to fraction form
    394,780.65/544,790.50 = 222,698.98/x
  3. Step 3: Cross multiply
    394,780.65x = 544,790.50 × 222,698.98
  4. Step 4: Simplify right side
    394,780.65x = 121,324,288,663.69
  5. Step 5: Solve for x
    x = 121,324,288,663.69/394,780.65
  6. Step 6: Final answer
    x = 307,320.76

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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.