Finding the Fourth Proportional to 991,378.40, 1,368,105.60 and 561,738.08
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Solution
The fourth proportional to 991,378.40, 1,368,105.60 and 561,738.08 is: 775,200.48
Step by Step Solution
- Step 1: Write the proportion equation
991,378.40 : 1,368,105.60 = 561,738.08 : x - Step 2: Convert to fraction form
991,378.40/1,368,105.60 = 561,738.08/x - Step 3: Cross multiply
991,378.40x = 1,368,105.60 × 561,738.08 - Step 4: Simplify right side
991,378.40x = 768,517,012,981.25 - Step 5: Solve for x
x = 768,517,012,981.25/991,378.40 - Step 6: Final answer
x = 775,200.48
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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.