Finding the Fourth Proportional to 3,915,419.91, 5,403,198.09 and 2,172,988.14
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Solution
The fourth proportional to 3,915,419.91, 5,403,198.09 and 2,172,988.14 is: 2,998,678.47
Step by Step Solution
- Step 1: Write the proportion equation
3,915,419.91 : 5,403,198.09 = 2,172,988.14 : x - Step 2: Convert to fraction form
3,915,419.91/5,403,198.09 = 2,172,988.14/x - Step 3: Cross multiply
3,915,419.91x = 5,403,198.09 × 2,172,988.14 - Step 4: Simplify right side
3,915,419.91x = 11,741,085,367,640.65 - Step 5: Solve for x
x = 11,741,085,367,640.65/3,915,419.91 - Step 6: Final answer
x = 2,998,678.47
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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.