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Finding the Fourth Proportional to 394,975.44, 545,065.86 and 213,687.42

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Solution

The fourth proportional to 394,975.44, 545,065.86 and 213,687.42 is: 294,888.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,975.44 : 545,065.86 = 213,687.42 : x
  2. Step 2: Convert to fraction form
    394,975.44/545,065.86 = 213,687.42/x
  3. Step 3: Cross multiply
    394,975.44x = 545,065.86 × 213,687.42
  4. Step 4: Simplify right side
    394,975.44x = 116,473,714,908.82
  5. Step 5: Solve for x
    x = 116,473,714,908.82/394,975.44
  6. Step 6: Final answer
    x = 294,888.50

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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.