Finding the Fourth Proportional to 720,396.87, 994,063.10 and 398,087.75
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Solution
The fourth proportional to 720,396.87, 994,063.10 and 398,087.75 is: 549,314.35
Step by Step Solution
- Step 1: Write the proportion equation
720,396.87 : 994,063.10 = 398,087.75 : x - Step 2: Convert to fraction form
720,396.87/994,063.10 = 398,087.75/x - Step 3: Cross multiply
720,396.87x = 994,063.10 × 398,087.75 - Step 4: Simplify right side
720,396.87x = 395,724,335,876.27 - Step 5: Solve for x
x = 395,724,335,876.27/720,396.87 - Step 6: Final answer
x = 549,314.35
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1.5x scale
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.