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Finding the Fourth Proportional to 331.26, 457.10 and 198.45

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Solution

The fourth proportional to 331.26, 457.10 and 198.45 is: 273.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.26 : 457.10 = 198.45 : x
  2. Step 2: Convert to fraction form
    331.26/457.10 = 198.45/x
  3. Step 3: Cross multiply
    331.26x = 457.10 × 198.45
  4. Step 4: Simplify right side
    331.26x = 90,711.50
  5. Step 5: Solve for x
    x = 90,711.50/331.26
  6. Step 6: Final answer
    x = 273.84

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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.