Finding the Fourth Proportional to 1,389,043.30, 2,080,288.15 and 858,201.70
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Solution
The fourth proportional to 1,389,043.30, 2,080,288.15 and 858,201.70 is: 1,285,278.02
Step by Step Solution
- Step 1: Write the proportion equation
1,389,043.30 : 2,080,288.15 = 858,201.70 : x - Step 2: Convert to fraction form
1,389,043.30/2,080,288.15 = 858,201.70/x - Step 3: Cross multiply
1,389,043.30x = 2,080,288.15 × 858,201.70 - Step 4: Simplify right side
1,389,043.30x = 1,785,306,826,819.85 - Step 5: Solve for x
x = 1,785,306,826,819.85/1,389,043.30 - Step 6: Final answer
x = 1,285,278.02
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.