Finding the Fourth Proportional to 3,978,766,990.94, 5,490,715,517.63 and 2,170,318,270.68
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Solution
The fourth proportional to 3,978,766,990.94, 5,490,715,517.63 and 2,170,318,270.68 is: 2,995,048,524.86
Step by Step Solution
- Step 1: Write the proportion equation
3,978,766,990.94 : 5,490,715,517.63 = 2,170,318,270.68 : x - Step 2: Convert to fraction form
3,978,766,990.94/5,490,715,517.63 = 2,170,318,270.68/x - Step 3: Cross multiply
3,978,766,990.94x = 5,490,715,517.63 × 2,170,318,270.68 - Step 4: Simplify right side
3,978,766,990.94x = 11,916,600,206,980,278,272 - Step 5: Solve for x
x = 11,916,600,206,980,278,272/3,978,766,990.94 - Step 6: Final answer
x = 2,995,048,524.86
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.