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Finding the Fourth Proportional to 413.14, 620.22 and 208.11

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Solution

The fourth proportional to 413.14, 620.22 and 208.11 is: 312.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.14 : 620.22 = 208.11 : x
  2. Step 2: Convert to fraction form
    413.14/620.22 = 208.11/x
  3. Step 3: Cross multiply
    413.14x = 620.22 × 208.11
  4. Step 4: Simplify right side
    413.14x = 129,071.85
  5. Step 5: Solve for x
    x = 129,071.85/413.14
  6. Step 6: Final answer
    x = 312.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.