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Finding the Fourth Proportional to 413.60, 620.78 and 194.33

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Solution

The fourth proportional to 413.60, 620.78 and 194.33 is: 291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.60 : 620.78 = 194.33 : x
  2. Step 2: Convert to fraction form
    413.60/620.78 = 194.33/x
  3. Step 3: Cross multiply
    413.60x = 620.78 × 194.33
  4. Step 4: Simplify right side
    413.60x = 120,636.76
  5. Step 5: Solve for x
    x = 120,636.76/413.60
  6. Step 6: Final answer
    x = 291.68

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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.