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Finding the Fourth Proportional to 395,399.70, 593,493.21 and 217,990.26

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Solution

The fourth proportional to 395,399.70, 593,493.21 and 217,990.26 is: 327,202.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,399.70 : 593,493.21 = 217,990.26 : x
  2. Step 2: Convert to fraction form
    395,399.70/593,493.21 = 217,990.26/x
  3. Step 3: Cross multiply
    395,399.70x = 593,493.21 × 217,990.26
  4. Step 4: Simplify right side
    395,399.70x = 129,375,739,156.14
  5. Step 5: Solve for x
    x = 129,375,739,156.14/395,399.70
  6. Step 6: Final answer
    x = 327,202.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.