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Finding the Fourth Proportional to 353.06, 528.82 and 198.90

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Solution

The fourth proportional to 353.06, 528.82 and 198.90 is: 297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.06 : 528.82 = 198.90 : x
  2. Step 2: Convert to fraction form
    353.06/528.82 = 198.90/x
  3. Step 3: Cross multiply
    353.06x = 528.82 × 198.90
  4. Step 4: Simplify right side
    353.06x = 105,181.80
  5. Step 5: Solve for x
    x = 105,181.80/353.06
  6. Step 6: Final answer
    x = 297.92

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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.