Finding the Fourth Proportional to 1,392,790.15, 1,921,872.84 and 811,867.94
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Solution
The fourth proportional to 1,392,790.15, 1,921,872.84 and 811,867.94 is: 1,120,274.25
Step by Step Solution
- Step 1: Write the proportion equation
1,392,790.15 : 1,921,872.84 = 811,867.94 : x - Step 2: Convert to fraction form
1,392,790.15/1,921,872.84 = 811,867.94/x - Step 3: Cross multiply
1,392,790.15x = 1,921,872.84 × 811,867.94 - Step 4: Simplify right side
1,392,790.15x = 1,560,306,938,105.90 - Step 5: Solve for x
x = 1,560,306,938,105.90/1,392,790.15 - Step 6: Final answer
x = 1,120,274.25
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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.