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Finding the Fourth Proportional to 394,479.56, 544,381.86 and 213,190.88

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Solution

The fourth proportional to 394,479.56, 544,381.86 and 213,190.88 is: 294,203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,479.56 : 544,381.86 = 213,190.88 : x
  2. Step 2: Convert to fraction form
    394,479.56/544,381.86 = 213,190.88/x
  3. Step 3: Cross multiply
    394,479.56x = 544,381.86 × 213,190.88
  4. Step 4: Simplify right side
    394,479.56x = 116,057,247,789.44
  5. Step 5: Solve for x
    x = 116,057,247,789.44/394,479.56
  6. Step 6: Final answer
    x = 294,203.45

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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.