Finding the Fourth Proportional to 1,391,620.62, 1,920,435.55 and 779,778.41
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Solution
The fourth proportional to 1,391,620.62, 1,920,435.55 and 779,778.41 is: 1,076,093.70
Step by Step Solution
- Step 1: Write the proportion equation
1,391,620.62 : 1,920,435.55 = 779,778.41 : x - Step 2: Convert to fraction form
1,391,620.62/1,920,435.55 = 779,778.41/x - Step 3: Cross multiply
1,391,620.62x = 1,920,435.55 × 779,778.41 - Step 4: Simplify right side
1,391,620.62x = 1,497,514,179,686.48 - Step 5: Solve for x
x = 1,497,514,179,686.48/1,391,620.62 - Step 6: Final answer
x = 1,076,093.70
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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.