Finding the Fourth Proportional to 715,882.05, 987,891.98 and 393,589.67
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Solution
The fourth proportional to 715,882.05, 987,891.98 and 393,589.67 is: 543,139.85
Step by Step Solution
- Step 1: Write the proportion equation
715,882.05 : 987,891.98 = 393,589.67 : x - Step 2: Convert to fraction form
715,882.05/987,891.98 = 393,589.67/x - Step 3: Cross multiply
715,882.05x = 987,891.98 × 393,589.67 - Step 4: Simplify right side
715,882.05x = 388,824,071,496.44 - Step 5: Solve for x
x = 388,824,071,496.44/715,882.05 - Step 6: Final answer
x = 543,139.85
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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.