Finding the Fourth Proportional to 1,391,629.97, 1,920,456.74 and 779,784.05
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Solution
The fourth proportional to 1,391,629.97, 1,920,456.74 and 779,784.05 is: 1,076,106.12
Step by Step Solution
- Step 1: Write the proportion equation
1,391,629.97 : 1,920,456.74 = 779,784.05 : x - Step 2: Convert to fraction form
1,391,629.97/1,920,456.74 = 779,784.05/x - Step 3: Cross multiply
1,391,629.97x = 1,920,456.74 × 779,784.05 - Step 4: Simplify right side
1,391,629.97x = 1,497,541,530,668.08 - Step 5: Solve for x
x = 1,497,541,530,668.08/1,391,629.97 - Step 6: Final answer
x = 1,076,106.12
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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.