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Finding the Fourth Proportional to 394,160.68, 543,941.61 and 212,872.65

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Solution

The fourth proportional to 394,160.68, 543,941.61 and 212,872.65 is: 293,764.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,160.68 : 543,941.61 = 212,872.65 : x
  2. Step 2: Convert to fraction form
    394,160.68/543,941.61 = 212,872.65/x
  3. Step 3: Cross multiply
    394,160.68x = 543,941.61 × 212,872.65
  4. Step 4: Simplify right side
    394,160.68x = 115,790,291,167.69
  5. Step 5: Solve for x
    x = 115,790,291,167.69/394,160.68
  6. Step 6: Final answer
    x = 293,764.18

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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.