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Finding the Fourth Proportional to 413.40, 620.08 and 105.26

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Solution

The fourth proportional to 413.40, 620.08 and 105.26 is: 157.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.40 : 620.08 = 105.26 : x
  2. Step 2: Convert to fraction form
    413.40/620.08 = 105.26/x
  3. Step 3: Cross multiply
    413.40x = 620.08 × 105.26
  4. Step 4: Simplify right side
    413.40x = 65,269.62
  5. Step 5: Solve for x
    x = 65,269.62/413.40
  6. Step 6: Final answer
    x = 157.88

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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.