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Finding the Fourth Proportional to 234.92, 351.90 and 153.80

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Solution

The fourth proportional to 234.92, 351.90 and 153.80 is: 230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.92 : 351.90 = 153.80 : x
  2. Step 2: Convert to fraction form
    234.92/351.90 = 153.80/x
  3. Step 3: Cross multiply
    234.92x = 351.90 × 153.80
  4. Step 4: Simplify right side
    234.92x = 54,122.22
  5. Step 5: Solve for x
    x = 54,122.22/234.92
  6. Step 6: Final answer
    x = 230.39

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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.