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Finding the Fourth Proportional to 208.03, 286.90 and 161.25

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Solution

The fourth proportional to 208.03, 286.90 and 161.25 is: 222.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.03 : 286.90 = 161.25 : x
  2. Step 2: Convert to fraction form
    208.03/286.90 = 161.25/x
  3. Step 3: Cross multiply
    208.03x = 286.90 × 161.25
  4. Step 4: Simplify right side
    208.03x = 46,262.63
  5. Step 5: Solve for x
    x = 46,262.63/208.03
  6. Step 6: Final answer
    x = 222.38

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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.