Finding the Fourth Proportional to 413.80, 620.69 and 380.99
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Solution
The fourth proportional to 413.80, 620.69 and 380.99 is: 571.48
Step by Step Solution
- Step 1: Write the proportion equation
413.80 : 620.69 = 380.99 : x - Step 2: Convert to fraction form
413.80/620.69 = 380.99/x - Step 3: Cross multiply
413.80x = 620.69 × 380.99 - Step 4: Simplify right side
413.80x = 236,476.68 - Step 5: Solve for x
x = 236,476.68/413.80 - Step 6: Final answer
x = 571.48
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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.