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Finding the Fourth Proportional to 263,257.79, 394,740.81 and 122,939.87

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Solution

The fourth proportional to 263,257.79, 394,740.81 and 122,939.87 is: 184,341.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,257.79 : 394,740.81 = 122,939.87 : x
  2. Step 2: Convert to fraction form
    263,257.79/394,740.81 = 122,939.87/x
  3. Step 3: Cross multiply
    263,257.79x = 394,740.81 × 122,939.87
  4. Step 4: Simplify right side
    263,257.79x = 48,529,381,891.39
  5. Step 5: Solve for x
    x = 48,529,381,891.39/263,257.79
  6. Step 6: Final answer
    x = 184,341.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.