Finding the Fourth Proportional to 1,131,421,879.02, 1,561,350,912.21 and 629,622,067.62
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Solution
The fourth proportional to 1,131,421,879.02, 1,561,350,912.21 and 629,622,067.62 is: 868,872,175.67
Step by Step Solution
- Step 1: Write the proportion equation
1,131,421,879.02 : 1,561,350,912.21 = 629,622,067.62 : x - Step 2: Convert to fraction form
1,131,421,879.02/1,561,350,912.21 = 629,622,067.62/x - Step 3: Cross multiply
1,131,421,879.02x = 1,561,350,912.21 × 629,622,067.62 - Step 4: Simplify right side
1,131,421,879.02x = 983,060,989,626,033,280 - Step 5: Solve for x
x = 983,060,989,626,033,280/1,131,421,879.02 - Step 6: Final answer
x = 868,872,175.67
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1.5x scale
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.