Finding the Fourth Proportional to 3,891,387.88, 5,370,119.94 and 2,172,507.40
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Solution
The fourth proportional to 3,891,387.88, 5,370,119.94 and 2,172,507.40 is: 2,998,062.82
Step by Step Solution
- Step 1: Write the proportion equation
3,891,387.88 : 5,370,119.94 = 2,172,507.40 : x - Step 2: Convert to fraction form
3,891,387.88/5,370,119.94 = 2,172,507.40/x - Step 3: Cross multiply
3,891,387.88x = 5,370,119.94 × 2,172,507.40 - Step 4: Simplify right side
3,891,387.88x = 11,666,625,308,537.56 - Step 5: Solve for x
x = 11,666,625,308,537.56/3,891,387.88 - Step 6: Final answer
x = 2,998,062.82
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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.