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Finding the Fourth Proportional to 339.22, 509.03 and 133.81

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Solution

The fourth proportional to 339.22, 509.03 and 133.81 is: 200.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.22 : 509.03 = 133.81 : x
  2. Step 2: Convert to fraction form
    339.22/509.03 = 133.81/x
  3. Step 3: Cross multiply
    339.22x = 509.03 × 133.81
  4. Step 4: Simplify right side
    339.22x = 68,113.30
  5. Step 5: Solve for x
    x = 68,113.30/339.22
  6. Step 6: Final answer
    x = 200.79

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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.