Finding the Fourth Proportional to 990,715.05, 1,367,605.28 and 668,861.09
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Solution
The fourth proportional to 990,715.05, 1,367,605.28 and 668,861.09 is: 923,310.85
Step by Step Solution
- Step 1: Write the proportion equation
990,715.05 : 1,367,605.28 = 668,861.09 : x - Step 2: Convert to fraction form
990,715.05/1,367,605.28 = 668,861.09/x - Step 3: Cross multiply
990,715.05x = 1,367,605.28 × 668,861.09 - Step 4: Simplify right side
990,715.05x = 914,737,958,270.56 - Step 5: Solve for x
x = 914,737,958,270.56/990,715.05 - Step 6: Final answer
x = 923,310.85
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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.