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Finding the Fourth Proportional to 208.12, 287.22 and 116.12

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Solution

The fourth proportional to 208.12, 287.22 and 116.12 is: 160.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.12 : 287.22 = 116.12 : x
  2. Step 2: Convert to fraction form
    208.12/287.22 = 116.12/x
  3. Step 3: Cross multiply
    208.12x = 287.22 × 116.12
  4. Step 4: Simplify right side
    208.12x = 33,351.99
  5. Step 5: Solve for x
    x = 33,351.99/208.12
  6. Step 6: Final answer
    x = 160.25

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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.