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Finding the Fourth Proportional to 339.98, 509.96 and 108.86

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Solution

The fourth proportional to 339.98, 509.96 and 108.86 is: 163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.98 : 509.96 = 108.86 : x
  2. Step 2: Convert to fraction form
    339.98/509.96 = 108.86/x
  3. Step 3: Cross multiply
    339.98x = 509.96 × 108.86
  4. Step 4: Simplify right side
    339.98x = 55,514.84
  5. Step 5: Solve for x
    x = 55,514.84/339.98
  6. Step 6: Final answer
    x = 163.29

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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.