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Finding the Fourth Proportional to 394,141.75, 543,917.81 and 215,293.75

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Solution

The fourth proportional to 394,141.75, 543,917.81 and 215,293.75 is: 297,106.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,141.75 : 543,917.81 = 215,293.75 : x
  2. Step 2: Convert to fraction form
    394,141.75/543,917.81 = 215,293.75/x
  3. Step 3: Cross multiply
    394,141.75x = 543,917.81 × 215,293.75
  4. Step 4: Simplify right side
    394,141.75x = 117,102,105,006.69
  5. Step 5: Solve for x
    x = 117,102,105,006.69/394,141.75
  6. Step 6: Final answer
    x = 297,106.57

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1.5x scale

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.