Finding the Fourth Proportional to 715,855.58, 987,898.14 and 393,571.94
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Solution
The fourth proportional to 715,855.58, 987,898.14 and 393,571.94 is: 543,138.87
Step by Step Solution
- Step 1: Write the proportion equation
715,855.58 : 987,898.14 = 393,571.94 : x - Step 2: Convert to fraction form
715,855.58/987,898.14 = 393,571.94/x - Step 3: Cross multiply
715,855.58x = 987,898.14 × 393,571.94 - Step 4: Simplify right side
715,855.58x = 388,808,987,482.19 - Step 5: Solve for x
x = 388,808,987,482.19/715,855.58 - Step 6: Final answer
x = 543,138.87
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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.