Finding the Fourth Proportional to 1,491,036,392.70, 2,236,554,589.05 and 509,571,153.90
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Solution
The fourth proportional to 1,491,036,392.70, 2,236,554,589.05 and 509,571,153.90 is: 764,356,730.85
Step by Step Solution
- Step 1: Write the proportion equation
1,491,036,392.70 : 2,236,554,589.05 = 509,571,153.90 : x - Step 2: Convert to fraction form
1,491,036,392.70/2,236,554,589.05 = 509,571,153.90/x - Step 3: Cross multiply
1,491,036,392.70x = 2,236,554,589.05 × 509,571,153.90 - Step 4: Simplify right side
1,491,036,392.70x = 1,139,683,702,702,548,864 - Step 5: Solve for x
x = 1,139,683,702,702,548,864/1,491,036,392.70 - Step 6: Final answer
x = 764,356,730.85
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Double scale
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Similar ratio
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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.