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Finding the Fourth Proportional to 360.82, 540.80 and 198.60

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Solution

The fourth proportional to 360.82, 540.80 and 198.60 is: 297.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.82 : 540.80 = 198.60 : x
  2. Step 2: Convert to fraction form
    360.82/540.80 = 198.60/x
  3. Step 3: Cross multiply
    360.82x = 540.80 × 198.60
  4. Step 4: Simplify right side
    360.82x = 107,402.88
  5. Step 5: Solve for x
    x = 107,402.88/360.82
  6. Step 6: Final answer
    x = 297.66

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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.