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Finding the Fourth Proportional to 230.81, 346.25 and 115.26

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Solution

The fourth proportional to 230.81, 346.25 and 115.26 is: 172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.81 : 346.25 = 115.26 : x
  2. Step 2: Convert to fraction form
    230.81/346.25 = 115.26/x
  3. Step 3: Cross multiply
    230.81x = 346.25 × 115.26
  4. Step 4: Simplify right side
    230.81x = 39,906.76
  5. Step 5: Solve for x
    x = 39,906.76/230.81
  6. Step 6: Final answer
    x = 172.90

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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.