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Finding the Fourth Proportional to 230.62, 345.94 and 68.30

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Solution

The fourth proportional to 230.62, 345.94 and 68.30 is: 102.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.62 : 345.94 = 68.30 : x
  2. Step 2: Convert to fraction form
    230.62/345.94 = 68.30/x
  3. Step 3: Cross multiply
    230.62x = 345.94 × 68.30
  4. Step 4: Simplify right side
    230.62x = 23,627.70
  5. Step 5: Solve for x
    x = 23,627.70/230.62
  6. Step 6: Final answer
    x = 102.45

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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.