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Finding the Fourth Proportional to 208.03, 287.06 and 120.69

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Solution

The fourth proportional to 208.03, 287.06 and 120.69 is: 166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.03 : 287.06 = 120.69 : x
  2. Step 2: Convert to fraction form
    208.03/287.06 = 120.69/x
  3. Step 3: Cross multiply
    208.03x = 287.06 × 120.69
  4. Step 4: Simplify right side
    208.03x = 34,645.27
  5. Step 5: Solve for x
    x = 34,645.27/208.03
  6. Step 6: Final answer
    x = 166.54

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