Finding the Fourth Proportional to 715,843.40, 987,854.99 and 393,550.67
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Solution
The fourth proportional to 715,843.40, 987,854.99 and 393,550.67 is: 543,095.02
Step by Step Solution
- Step 1: Write the proportion equation
715,843.40 : 987,854.99 = 393,550.67 : x - Step 2: Convert to fraction form
715,843.40/987,854.99 = 393,550.67/x - Step 3: Cross multiply
715,843.40x = 987,854.99 × 393,550.67 - Step 4: Simplify right side
715,843.40x = 388,770,986,270.32 - Step 5: Solve for x
x = 388,770,986,270.32/715,843.40 - Step 6: Final answer
x = 543,095.02
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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.