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Finding the Fourth Proportional to 230.90, 346.30 and 68.56

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Solution

The fourth proportional to 230.90, 346.30 and 68.56 is: 102.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.90 : 346.30 = 68.56 : x
  2. Step 2: Convert to fraction form
    230.90/346.30 = 68.56/x
  3. Step 3: Cross multiply
    230.90x = 346.30 × 68.56
  4. Step 4: Simplify right side
    230.90x = 23,741.29
  5. Step 5: Solve for x
    x = 23,741.29/230.90
  6. Step 6: Final answer
    x = 102.82

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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.