Finding the Fourth Proportional to 311,876,463.21, 430,392,920.45 and 172,649,550.03
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Solution
The fourth proportional to 311,876,463.21, 430,392,920.45 and 172,649,550.03 is: 238,258,261.90
Step by Step Solution
- Step 1: Write the proportion equation
311,876,463.21 : 430,392,920.45 = 172,649,550.03 : x - Step 2: Convert to fraction form
311,876,463.21/430,392,920.45 = 172,649,550.03/x - Step 3: Cross multiply
311,876,463.21x = 430,392,920.45 × 172,649,550.03 - Step 4: Simplify right side
311,876,463.21x = 74,307,144,051,790,080 - Step 5: Solve for x
x = 74,307,144,051,790,080/311,876,463.21 - Step 6: Final answer
x = 238,258,261.90
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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.