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Finding the Fourth Proportional to 339.77, 509.65 and 108.68

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Solution

The fourth proportional to 339.77, 509.65 and 108.68 is: 163.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.77 : 509.65 = 108.68 : x
  2. Step 2: Convert to fraction form
    339.77/509.65 = 108.68/x
  3. Step 3: Cross multiply
    339.77x = 509.65 × 108.68
  4. Step 4: Simplify right side
    339.77x = 55,388.22
  5. Step 5: Solve for x
    x = 55,388.22/339.77
  6. Step 6: Final answer
    x = 163.02

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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.