Finding the Fourth Proportional to 428,841.87, 642,450.87 and 286,257.21
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Solution
The fourth proportional to 428,841.87, 642,450.87 and 286,257.21 is: 428,843.84
Step by Step Solution
- Step 1: Write the proportion equation
428,841.87 : 642,450.87 = 286,257.21 : x - Step 2: Convert to fraction form
428,841.87/642,450.87 = 286,257.21/x - Step 3: Cross multiply
428,841.87x = 642,450.87 × 286,257.21 - Step 4: Simplify right side
428,841.87x = 183,906,195,930.04 - Step 5: Solve for x
x = 183,906,195,930.04/428,841.87 - Step 6: Final answer
x = 428,843.84
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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.