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Finding the Fourth Proportional to 355.67, 490.83 and 198.32

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Solution

The fourth proportional to 355.67, 490.83 and 198.32 is: 273.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.67 : 490.83 = 198.32 : x
  2. Step 2: Convert to fraction form
    355.67/490.83 = 198.32/x
  3. Step 3: Cross multiply
    355.67x = 490.83 × 198.32
  4. Step 4: Simplify right side
    355.67x = 97,341.41
  5. Step 5: Solve for x
    x = 97,341.41/355.67
  6. Step 6: Final answer
    x = 273.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.