Finding the Fourth Proportional to 1,279,933.80, 1,919,382.30 and 438,052.20
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Solution
The fourth proportional to 1,279,933.80, 1,919,382.30 and 438,052.20 is: 656,900.88
Step by Step Solution
- Step 1: Write the proportion equation
1,279,933.80 : 1,919,382.30 = 438,052.20 : x - Step 2: Convert to fraction form
1,279,933.80/1,919,382.30 = 438,052.20/x - Step 3: Cross multiply
1,279,933.80x = 1,919,382.30 × 438,052.20 - Step 4: Simplify right side
1,279,933.80x = 840,789,639,156.06 - Step 5: Solve for x
x = 840,789,639,156.06/1,279,933.80 - Step 6: Final answer
x = 656,900.88
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1.5x scale
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.