Finding the Fourth Proportional to 1,161,235,315.20, 1,741,852,972.80 and 985,883,404.80
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Solution
The fourth proportional to 1,161,235,315.20, 1,741,852,972.80 and 985,883,404.80 is: 1,478,825,107.20
Step by Step Solution
- Step 1: Write the proportion equation
1,161,235,315.20 : 1,741,852,972.80 = 985,883,404.80 : x - Step 2: Convert to fraction form
1,161,235,315.20/1,741,852,972.80 = 985,883,404.80/x - Step 3: Cross multiply
1,161,235,315.20x = 1,741,852,972.80 × 985,883,404.80 - Step 4: Simplify right side
1,161,235,315.20x = 1,717,263,939,485,065,728 - Step 5: Solve for x
x = 1,717,263,939,485,065,728/1,161,235,315.20 - Step 6: Final answer
x = 1,478,825,107.20
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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.