Finding the Fourth Proportional to 822,879.20, 1,135,115.88 and 478,676.40
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Solution
The fourth proportional to 822,879.20, 1,135,115.88 and 478,676.40 is: 660,307.35
Step by Step Solution
- Step 1: Write the proportion equation
822,879.20 : 1,135,115.88 = 478,676.40 : x - Step 2: Convert to fraction form
822,879.20/1,135,115.88 = 478,676.40/x - Step 3: Cross multiply
822,879.20x = 1,135,115.88 × 478,676.40 - Step 4: Simplify right side
822,879.20x = 543,353,183,021.23 - Step 5: Solve for x
x = 543,353,183,021.23/822,879.20 - Step 6: Final answer
x = 660,307.35
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1.5x scale
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.