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Finding the Fourth Proportional to 215.36, 321.36 and 198.08

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Solution

The fourth proportional to 215.36, 321.36 and 198.08 is: 295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.36 : 321.36 = 198.08 : x
  2. Step 2: Convert to fraction form
    215.36/321.36 = 198.08/x
  3. Step 3: Cross multiply
    215.36x = 321.36 × 198.08
  4. Step 4: Simplify right side
    215.36x = 63,654.99
  5. Step 5: Solve for x
    x = 63,654.99/215.36
  6. Step 6: Final answer
    x = 295.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.