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Finding the Fourth Proportional to 223.76, 309.16 and 198.16

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Solution

The fourth proportional to 223.76, 309.16 and 198.16 is: 273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.76 : 309.16 = 198.16 : x
  2. Step 2: Convert to fraction form
    223.76/309.16 = 198.16/x
  3. Step 3: Cross multiply
    223.76x = 309.16 × 198.16
  4. Step 4: Simplify right side
    223.76x = 61,263.15
  5. Step 5: Solve for x
    x = 61,263.15/223.76
  6. Step 6: Final answer
    x = 273.79

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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.