Finding the Fourth Proportional to 1,280,954.39, 1,921,530.78 and 428,028.99
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Solution
The fourth proportional to 1,280,954.39, 1,921,530.78 and 428,028.99 is: 642,076.63
Step by Step Solution
- Step 1: Write the proportion equation
1,280,954.39 : 1,921,530.78 = 428,028.99 : x - Step 2: Convert to fraction form
1,280,954.39/1,921,530.78 = 428,028.99/x - Step 3: Cross multiply
1,280,954.39x = 1,921,530.78 × 428,028.99 - Step 4: Simplify right side
1,280,954.39x = 822,470,879,017.31 - Step 5: Solve for x
x = 822,470,879,017.31/1,280,954.39 - Step 6: Final answer
x = 642,076.63
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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.