Finding the Fourth Proportional to 1,161,235,231.20, 1,741,852,846.80 and 985,883,320.80
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Solution
The fourth proportional to 1,161,235,231.20, 1,741,852,846.80 and 985,883,320.80 is: 1,478,824,981.20
Step by Step Solution
- Step 1: Write the proportion equation
1,161,235,231.20 : 1,741,852,846.80 = 985,883,320.80 : x - Step 2: Convert to fraction form
1,161,235,231.20/1,741,852,846.80 = 985,883,320.80/x - Step 3: Cross multiply
1,161,235,231.20x = 1,741,852,846.80 × 985,883,320.80 - Step 4: Simplify right side
1,161,235,231.20x = 1,717,263,668,948,117,504 - Step 5: Solve for x
x = 1,717,263,668,948,117,504/1,161,235,231.20 - Step 6: Final answer
x = 1,478,824,981.20
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1.5x scale
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.