Finding the Fourth Proportional to 905,420,855.70, 1,358,131,283.55 and 905,420,855.70
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Solution
The fourth proportional to 905,420,855.70, 1,358,131,283.55 and 905,420,855.70 is: 1,358,131,283.55
Step by Step Solution
- Step 1: Write the proportion equation
905,420,855.70 : 1,358,131,283.55 = 905,420,855.70 : x - Step 2: Convert to fraction form
905,420,855.70/1,358,131,283.55 = 905,420,855.70/x - Step 3: Cross multiply
905,420,855.70x = 1,358,131,283.55 × 905,420,855.70 - Step 4: Simplify right side
905,420,855.70x = 1,229,680,388,904,780,288 - Step 5: Solve for x
x = 1,229,680,388,904,780,288/905,420,855.70 - Step 6: Final answer
x = 1,358,131,283.55
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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.