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Finding the Fourth Proportional to 234.90, 351.95 and 198.86

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Solution

The fourth proportional to 234.90, 351.95 and 198.86 is: 297.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.90 : 351.95 = 198.86 : x
  2. Step 2: Convert to fraction form
    234.90/351.95 = 198.86/x
  3. Step 3: Cross multiply
    234.90x = 351.95 × 198.86
  4. Step 4: Simplify right side
    234.90x = 69,986.02
  5. Step 5: Solve for x
    x = 69,986.02/234.90
  6. Step 6: Final answer
    x = 297.94

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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.