Finding the Fourth Proportional to 642,378.09, 886,489.35 and 351,997.95
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Solution
The fourth proportional to 642,378.09, 886,489.35 and 351,997.95 is: 485,761.33
Step by Step Solution
- Step 1: Write the proportion equation
642,378.09 : 886,489.35 = 351,997.95 : x - Step 2: Convert to fraction form
642,378.09/886,489.35 = 351,997.95/x - Step 3: Cross multiply
642,378.09x = 886,489.35 × 351,997.95 - Step 4: Simplify right side
642,378.09x = 312,042,433,896.83 - Step 5: Solve for x
x = 312,042,433,896.83/642,378.09 - Step 6: Final answer
x = 485,761.33
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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.