Finding the Fourth Proportional to 720,620.57, 994,413.15 and 398,311.44
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Solution
The fourth proportional to 720,620.57, 994,413.15 and 398,311.44 is: 549,645.89
Step by Step Solution
- Step 1: Write the proportion equation
720,620.57 : 994,413.15 = 398,311.44 : x - Step 2: Convert to fraction form
720,620.57/994,413.15 = 398,311.44/x - Step 3: Cross multiply
720,620.57x = 994,413.15 × 398,311.44 - Step 4: Simplify right side
720,620.57x = 396,086,133,731.44 - Step 5: Solve for x
x = 396,086,133,731.44/720,620.57 - Step 6: Final answer
x = 549,645.89
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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.