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Finding the Fourth Proportional to 208.96, 311.07 and 199.01

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Solution

The fourth proportional to 208.96, 311.07 and 199.01 is: 296.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.96 : 311.07 = 199.01 : x
  2. Step 2: Convert to fraction form
    208.96/311.07 = 199.01/x
  3. Step 3: Cross multiply
    208.96x = 311.07 × 199.01
  4. Step 4: Simplify right side
    208.96x = 61,906.45
  5. Step 5: Solve for x
    x = 61,906.45/208.96
  6. Step 6: Final answer
    x = 296.26

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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.