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Finding the Fourth Proportional to 339.62, 509.33 and 134.15

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Solution

The fourth proportional to 339.62, 509.33 and 134.15 is: 201.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.62 : 509.33 = 134.15 : x
  2. Step 2: Convert to fraction form
    339.62/509.33 = 134.15/x
  3. Step 3: Cross multiply
    339.62x = 509.33 × 134.15
  4. Step 4: Simplify right side
    339.62x = 68,323.40
  5. Step 5: Solve for x
    x = 68,323.40/339.62
  6. Step 6: Final answer
    x = 201.18

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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.