Finding the Fourth Proportional to 1,010,647,427.80, 1,515,971,141.70 and 617,806,240.60
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Solution
The fourth proportional to 1,010,647,427.80, 1,515,971,141.70 and 617,806,240.60 is: 926,709,360.90
Step by Step Solution
- Step 1: Write the proportion equation
1,010,647,427.80 : 1,515,971,141.70 = 617,806,240.60 : x - Step 2: Convert to fraction form
1,010,647,427.80/1,515,971,141.70 = 617,806,240.60/x - Step 3: Cross multiply
1,010,647,427.80x = 1,515,971,141.70 × 617,806,240.60 - Step 4: Simplify right side
1,010,647,427.80x = 936,576,431,911,766,912 - Step 5: Solve for x
x = 936,576,431,911,766,912/1,010,647,427.80 - Step 6: Final answer
x = 926,709,360.90
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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.