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Finding the Fourth Proportional to 394,991.56, 545,087.76 and 213,702.88

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Solution

The fourth proportional to 394,991.56, 545,087.76 and 213,702.88 is: 294,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,991.56 : 545,087.76 = 213,702.88 : x
  2. Step 2: Convert to fraction form
    394,991.56/545,087.76 = 213,702.88/x
  3. Step 3: Cross multiply
    394,991.56x = 545,087.76 × 213,702.88
  4. Step 4: Simplify right side
    394,991.56x = 116,486,824,164.75
  5. Step 5: Solve for x
    x = 116,486,824,164.75/394,991.56
  6. Step 6: Final answer
    x = 294,909.65

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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.