Finding the Fourth Proportional to 413.97, 620.77 and 139.99
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Solution
The fourth proportional to 413.97, 620.77 and 139.99 is: 209.92
Step by Step Solution
- Step 1: Write the proportion equation
413.97 : 620.77 = 139.99 : x - Step 2: Convert to fraction form
413.97/620.77 = 139.99/x - Step 3: Cross multiply
413.97x = 620.77 × 139.99 - Step 4: Simplify right side
413.97x = 86,901.59 - Step 5: Solve for x
x = 86,901.59/413.97 - Step 6: Final answer
x = 209.92
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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.