Finding the Fourth Proportional to 715,792.87, 987,813.01 and 393,511.08
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Solution
The fourth proportional to 715,792.87, 987,813.01 and 393,511.08 is: 543,055.65
Step by Step Solution
- Step 1: Write the proportion equation
715,792.87 : 987,813.01 = 393,511.08 : x - Step 2: Convert to fraction form
715,792.87/987,813.01 = 393,511.08/x - Step 3: Cross multiply
715,792.87x = 987,813.01 × 393,511.08 - Step 4: Simplify right side
715,792.87x = 388,715,364,403.15 - Step 5: Solve for x
x = 388,715,364,403.15/715,792.87 - Step 6: Final answer
x = 543,055.65
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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.