Finding the Fourth Proportional to 1,276,380,629.75, 1,761,405,342.64 and 689,669,765.75
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Solution
The fourth proportional to 1,276,380,629.75, 1,761,405,342.64 and 689,669,765.75 is: 951,744,316.50
Step by Step Solution
- Step 1: Write the proportion equation
1,276,380,629.75 : 1,761,405,342.64 = 689,669,765.75 : x - Step 2: Convert to fraction form
1,276,380,629.75/1,761,405,342.64 = 689,669,765.75/x - Step 3: Cross multiply
1,276,380,629.75x = 1,761,405,342.64 × 689,669,765.75 - Step 4: Simplify right side
1,276,380,629.75x = 1,214,788,010,052,006,656 - Step 5: Solve for x
x = 1,214,788,010,052,006,656/1,276,380,629.75 - Step 6: Final answer
x = 951,744,316.50
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.