Finding the Fourth Proportional to 319,198,396.70, 440,493,588.42 and 172,520,680.70
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Solution
The fourth proportional to 319,198,396.70, 440,493,588.42 and 172,520,680.70 is: 238,078,431.80
Step by Step Solution
- Step 1: Write the proportion equation
319,198,396.70 : 440,493,588.42 = 172,520,680.70 : x - Step 2: Convert to fraction form
319,198,396.70/440,493,588.42 = 172,520,680.70/x - Step 3: Cross multiply
319,198,396.70x = 440,493,588.42 × 172,520,680.70 - Step 4: Simplify right side
319,198,396.70x = 75,994,253,718,204,032 - Step 5: Solve for x
x = 75,994,253,718,204,032/319,198,396.70 - Step 6: Final answer
x = 238,078,431.80
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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.