Finding the Fourth Proportional to 1,290,436.68, 1,780,792.74 and 717,471.84
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Solution
The fourth proportional to 1,290,436.68, 1,780,792.74 and 717,471.84 is: 990,105.65
Step by Step Solution
- Step 1: Write the proportion equation
1,290,436.68 : 1,780,792.74 = 717,471.84 : x - Step 2: Convert to fraction form
1,290,436.68/1,780,792.74 = 717,471.84/x - Step 3: Cross multiply
1,290,436.68x = 1,780,792.74 × 717,471.84 - Step 4: Simplify right side
1,290,436.68x = 1,277,668,643,826.44 - Step 5: Solve for x
x = 1,277,668,643,826.44/1,290,436.68 - Step 6: Final answer
x = 990,105.65
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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.