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Finding the Fourth Proportional to 285,399.35, 394,115.84 and 213,654.81

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Solution

The fourth proportional to 285,399.35, 394,115.84 and 213,654.81 is: 295,041.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,399.35 : 394,115.84 = 213,654.81 : x
  2. Step 2: Convert to fraction form
    285,399.35/394,115.84 = 213,654.81/x
  3. Step 3: Cross multiply
    285,399.35x = 394,115.84 × 213,654.81
  4. Step 4: Simplify right side
    285,399.35x = 84,204,743,844.92
  5. Step 5: Solve for x
    x = 84,204,743,844.92/285,399.35
  6. Step 6: Final answer
    x = 295,041.83

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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.