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Finding the Fourth Proportional to 394,159.56, 543,940.05 and 212,871.52

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Solution

The fourth proportional to 394,159.56, 543,940.05 and 212,871.52 is: 293,762.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,159.56 : 543,940.05 = 212,871.52 : x
  2. Step 2: Convert to fraction form
    394,159.56/543,940.05 = 212,871.52/x
  3. Step 3: Cross multiply
    394,159.56x = 543,940.05 × 212,871.52
  4. Step 4: Simplify right side
    394,159.56x = 115,789,348,240.40
  5. Step 5: Solve for x
    x = 115,789,348,240.40/394,159.56
  6. Step 6: Final answer
    x = 293,762.63

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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.