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Finding the Fourth Proportional to 415.03, 621.99 and 198.13

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Solution

The fourth proportional to 415.03, 621.99 and 198.13 is: 296.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.03 : 621.99 = 198.13 : x
  2. Step 2: Convert to fraction form
    415.03/621.99 = 198.13/x
  3. Step 3: Cross multiply
    415.03x = 621.99 × 198.13
  4. Step 4: Simplify right side
    415.03x = 123,234.88
  5. Step 5: Solve for x
    x = 123,234.88/415.03
  6. Step 6: Final answer
    x = 296.93

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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.