Finding the Fourth Proportional to 287,442.20, 431,163.30 and 109,857.80
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Solution
The fourth proportional to 287,442.20, 431,163.30 and 109,857.80 is: 164,786.70
Step by Step Solution
- Step 1: Write the proportion equation
287,442.20 : 431,163.30 = 109,857.80 : x - Step 2: Convert to fraction form
287,442.20/431,163.30 = 109,857.80/x - Step 3: Cross multiply
287,442.20x = 431,163.30 × 109,857.80 - Step 4: Simplify right side
287,442.20x = 47,366,651,578.74 - Step 5: Solve for x
x = 47,366,651,578.74/287,442.20 - Step 6: Final answer
x = 164,786.70
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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.