Finding the Fourth Proportional to 691,101,012.70, 1,036,651,519.05 and 645,751,380.70
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Solution
The fourth proportional to 691,101,012.70, 1,036,651,519.05 and 645,751,380.70 is: 968,627,071.05
Step by Step Solution
- Step 1: Write the proportion equation
691,101,012.70 : 1,036,651,519.05 = 645,751,380.70 : x - Step 2: Convert to fraction form
691,101,012.70/1,036,651,519.05 = 645,751,380.70/x - Step 3: Cross multiply
691,101,012.70x = 1,036,651,519.05 × 645,751,380.70 - Step 4: Simplify right side
691,101,012.70x = 669,419,149,731,289,856 - Step 5: Solve for x
x = 669,419,149,731,289,856/691,101,012.70 - Step 6: Final answer
x = 968,627,071.05
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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.