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Finding the Fourth Proportional to 329.93, 455.36 and 198.93

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Solution

The fourth proportional to 329.93, 455.36 and 198.93 is: 274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.93 : 455.36 = 198.93 : x
  2. Step 2: Convert to fraction form
    329.93/455.36 = 198.93/x
  3. Step 3: Cross multiply
    329.93x = 455.36 × 198.93
  4. Step 4: Simplify right side
    329.93x = 90,583.77
  5. Step 5: Solve for x
    x = 90,583.77/329.93
  6. Step 6: Final answer
    x = 274.56

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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.