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Finding the Fourth Proportional to 231.05, 346.16 and 109.05

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Solution

The fourth proportional to 231.05, 346.16 and 109.05 is: 163.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.05 : 346.16 = 109.05 : x
  2. Step 2: Convert to fraction form
    231.05/346.16 = 109.05/x
  3. Step 3: Cross multiply
    231.05x = 346.16 × 109.05
  4. Step 4: Simplify right side
    231.05x = 37,748.20
  5. Step 5: Solve for x
    x = 37,748.20/231.05
  6. Step 6: Final answer
    x = 163.38

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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.