Finding the Fourth Proportional to 1,392,725.63, 1,921,990.53 and 789,113.63
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Solution
The fourth proportional to 1,392,725.63, 1,921,990.53 and 789,113.63 is: 1,088,993.33
Step by Step Solution
- Step 1: Write the proportion equation
1,392,725.63 : 1,921,990.53 = 789,113.63 : x - Step 2: Convert to fraction form
1,392,725.63/1,921,990.53 = 789,113.63/x - Step 3: Cross multiply
1,392,725.63x = 1,921,990.53 × 789,113.63 - Step 4: Simplify right side
1,392,725.63x = 1,516,668,914,343.97 - Step 5: Solve for x
x = 1,516,668,914,343.97/1,392,725.63 - Step 6: Final answer
x = 1,088,993.33
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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.