Finding the Fourth Proportional to 378,120.13, 521,816.91 and 208,365.19
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Solution
The fourth proportional to 378,120.13, 521,816.91 and 208,365.19 is: 287,550.09
Step by Step Solution
- Step 1: Write the proportion equation
378,120.13 : 521,816.91 = 208,365.19 : x - Step 2: Convert to fraction form
378,120.13/521,816.91 = 208,365.19/x - Step 3: Cross multiply
378,120.13x = 521,816.91 × 208,365.19 - Step 4: Simplify right side
378,120.13x = 108,728,476,988.28 - Step 5: Solve for x
x = 108,728,476,988.28/378,120.13 - Step 6: Final answer
x = 287,550.09
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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.