Finding the Fourth Proportional to 311,987,201.65, 430,537,076.49 and 172,754,974.06
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Solution
The fourth proportional to 311,987,201.65, 430,537,076.49 and 172,754,974.06 is: 238,398,950.62
Step by Step Solution
- Step 1: Write the proportion equation
311,987,201.65 : 430,537,076.49 = 172,754,974.06 : x - Step 2: Convert to fraction form
311,987,201.65/430,537,076.49 = 172,754,974.06/x - Step 3: Cross multiply
311,987,201.65x = 430,537,076.49 × 172,754,974.06 - Step 4: Simplify right side
311,987,201.65x = 74,377,421,478,745,504 - Step 5: Solve for x
x = 74,377,421,478,745,504/311,987,201.65 - Step 6: Final answer
x = 238,398,950.62
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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.