Finding the Fourth Proportional to 485,404.70, 669,803.11 and 281,413.09
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Solution
The fourth proportional to 485,404.70, 669,803.11 and 281,413.09 is: 388,317.96
Step by Step Solution
- Step 1: Write the proportion equation
485,404.70 : 669,803.11 = 281,413.09 : x - Step 2: Convert to fraction form
485,404.70/669,803.11 = 281,413.09/x - Step 3: Cross multiply
485,404.70x = 669,803.11 × 281,413.09 - Step 4: Simplify right side
485,404.70x = 188,491,362,876.71 - Step 5: Solve for x
x = 188,491,362,876.71/485,404.70 - Step 6: Final answer
x = 388,317.96
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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.