Finding the Fourth Proportional to 388,039,740.80, 582,059,611.20 and 193,981,107.20
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Solution
The fourth proportional to 388,039,740.80, 582,059,611.20 and 193,981,107.20 is: 290,971,660.80
Step by Step Solution
- Step 1: Write the proportion equation
388,039,740.80 : 582,059,611.20 = 193,981,107.20 : x - Step 2: Convert to fraction form
388,039,740.80/582,059,611.20 = 193,981,107.20/x - Step 3: Cross multiply
388,039,740.80x = 582,059,611.20 × 193,981,107.20 - Step 4: Simplify right side
388,039,740.80x = 112,908,567,836,977,520 - Step 5: Solve for x
x = 112,908,567,836,977,520/388,039,740.80 - Step 6: Final answer
x = 290,971,660.80
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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.