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Finding the Fourth Proportional to 339.36, 509.07 and 166.11

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Solution

The fourth proportional to 339.36, 509.07 and 166.11 is: 249.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.36 : 509.07 = 166.11 : x
  2. Step 2: Convert to fraction form
    339.36/509.07 = 166.11/x
  3. Step 3: Cross multiply
    339.36x = 509.07 × 166.11
  4. Step 4: Simplify right side
    339.36x = 84,561.62
  5. Step 5: Solve for x
    x = 84,561.62/339.36
  6. Step 6: Final answer
    x = 249.18

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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.