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Finding the Fourth Proportional to 234.85, 350.70 and 221.35

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Solution

The fourth proportional to 234.85, 350.70 and 221.35 is: 330.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.85 : 350.70 = 221.35 : x
  2. Step 2: Convert to fraction form
    234.85/350.70 = 221.35/x
  3. Step 3: Cross multiply
    234.85x = 350.70 × 221.35
  4. Step 4: Simplify right side
    234.85x = 77,627.45
  5. Step 5: Solve for x
    x = 77,627.45/234.85
  6. Step 6: Final answer
    x = 330.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.