Finding the Fourth Proportional to 392,511,679.05, 541,669,699.40 and 216,305,996.66
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Solution
The fourth proportional to 392,511,679.05, 541,669,699.40 and 216,305,996.66 is: 298,504,249.53
Step by Step Solution
- Step 1: Write the proportion equation
392,511,679.05 : 541,669,699.40 = 216,305,996.66 : x - Step 2: Convert to fraction form
392,511,679.05/541,669,699.40 = 216,305,996.66/x - Step 3: Cross multiply
392,511,679.05x = 541,669,699.40 × 216,305,996.66 - Step 4: Simplify right side
392,511,679.05x = 117,166,404,185,449,728 - Step 5: Solve for x
x = 117,166,404,185,449,728/392,511,679.05 - Step 6: Final answer
x = 298,504,249.53
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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.