Finding the Fourth Proportional to 919,302,759.70, 1,378,954,139.55 and 919,302,759.70
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Solution
The fourth proportional to 919,302,759.70, 1,378,954,139.55 and 919,302,759.70 is: 1,378,954,139.55
Step by Step Solution
- Step 1: Write the proportion equation
919,302,759.70 : 1,378,954,139.55 = 919,302,759.70 : x - Step 2: Convert to fraction form
919,302,759.70/1,378,954,139.55 = 919,302,759.70/x - Step 3: Cross multiply
919,302,759.70x = 1,378,954,139.55 × 919,302,759.70 - Step 4: Simplify right side
919,302,759.70x = 1,267,676,345,988,054,016 - Step 5: Solve for x
x = 1,267,676,345,988,054,016/919,302,759.70 - Step 6: Final answer
x = 1,378,954,139.55
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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.