Finding the Fourth Proportional to 388,135,491.39, 535,622,915.79 and 211,922,940.60
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Solution
The fourth proportional to 388,135,491.39, 535,622,915.79 and 211,922,940.60 is: 292,451,439.99
Step by Step Solution
- Step 1: Write the proportion equation
388,135,491.39 : 535,622,915.79 = 211,922,940.60 : x - Step 2: Convert to fraction form
388,135,491.39/535,622,915.79 = 211,922,940.60/x - Step 3: Cross multiply
388,135,491.39x = 535,622,915.79 × 211,922,940.60 - Step 4: Simplify right side
388,135,491.39x = 113,510,783,366,962,976 - Step 5: Solve for x
x = 113,510,783,366,962,976/388,135,491.39 - Step 6: Final answer
x = 292,451,439.99
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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.