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Finding the Fourth Proportional to 339.96, 509.87 and 134.59

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Solution

The fourth proportional to 339.96, 509.87 and 134.59 is: 201.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.96 : 509.87 = 134.59 : x
  2. Step 2: Convert to fraction form
    339.96/509.87 = 134.59/x
  3. Step 3: Cross multiply
    339.96x = 509.87 × 134.59
  4. Step 4: Simplify right side
    339.96x = 68,620.85
  5. Step 5: Solve for x
    x = 68,620.85/339.96
  6. Step 6: Final answer
    x = 201.85

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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.