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Finding the Fourth Proportional to 360.80, 541.28 and 198.44

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Solution

The fourth proportional to 360.80, 541.28 and 198.44 is: 297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.80 : 541.28 = 198.44 : x
  2. Step 2: Convert to fraction form
    360.80/541.28 = 198.44/x
  3. Step 3: Cross multiply
    360.80x = 541.28 × 198.44
  4. Step 4: Simplify right side
    360.80x = 107,411.60
  5. Step 5: Solve for x
    x = 107,411.60/360.80
  6. Step 6: Final answer
    x = 297.70

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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.