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Finding the Fourth Proportional to 394,530, 544,453.32 and 215,682

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Solution

The fourth proportional to 394,530, 544,453.32 and 215,682 is: 297,642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,530 : 544,453.32 = 215,682 : x
  2. Step 2: Convert to fraction form
    394,530/544,453.32 = 215,682/x
  3. Step 3: Cross multiply
    394,530x = 544,453.32 × 215,682
  4. Step 4: Simplify right side
    394,530x = 117,428,780,964.24
  5. Step 5: Solve for x
    x = 117,428,780,964.24/394,530
  6. Step 6: Final answer
    x = 297,642.21

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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.