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Finding the Fourth Proportional to 303.05, 417.89 and 198.16

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Solution

The fourth proportional to 303.05, 417.89 and 198.16 is: 273.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.05 : 417.89 = 198.16 : x
  2. Step 2: Convert to fraction form
    303.05/417.89 = 198.16/x
  3. Step 3: Cross multiply
    303.05x = 417.89 × 198.16
  4. Step 4: Simplify right side
    303.05x = 82,808.53
  5. Step 5: Solve for x
    x = 82,808.53/303.05
  6. Step 6: Final answer
    x = 273.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.