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Finding the Fourth Proportional to 394,628.49, 543,843.32 and 285,548.22

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Solution

The fourth proportional to 394,628.49, 543,843.32 and 285,548.22 is: 393,518.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,628.49 : 543,843.32 = 285,548.22 : x
  2. Step 2: Convert to fraction form
    394,628.49/543,843.32 = 285,548.22/x
  3. Step 3: Cross multiply
    394,628.49x = 543,843.32 × 285,548.22
  4. Step 4: Simplify right side
    394,628.49x = 155,293,490,557.15
  5. Step 5: Solve for x
    x = 155,293,490,557.15/394,628.49
  6. Step 6: Final answer
    x = 393,518.19

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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.