Finding the Fourth Proportional to 287,786.62, 431,990.97 and 121,691.26
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Solution
The fourth proportional to 287,786.62, 431,990.97 and 121,691.26 is: 182,668.41
Step by Step Solution
- Step 1: Write the proportion equation
287,786.62 : 431,990.97 = 121,691.26 : x - Step 2: Convert to fraction form
287,786.62/431,990.97 = 121,691.26/x - Step 3: Cross multiply
287,786.62x = 431,990.97 × 121,691.26 - Step 4: Simplify right side
287,786.62x = 52,569,525,447.92 - Step 5: Solve for x
x = 52,569,525,447.92/287,786.62 - Step 6: Final answer
x = 182,668.41
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.