Finding the Fourth Proportional to 1,138,428.40, 1,707,642.60 and 428,615.68
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Solution
The fourth proportional to 1,138,428.40, 1,707,642.60 and 428,615.68 is: 642,923.52
Step by Step Solution
- Step 1: Write the proportion equation
1,138,428.40 : 1,707,642.60 = 428,615.68 : x - Step 2: Convert to fraction form
1,138,428.40/1,707,642.60 = 428,615.68/x - Step 3: Cross multiply
1,138,428.40x = 1,707,642.60 × 428,615.68 - Step 4: Simplify right side
1,138,428.40x = 731,922,394,195.97 - Step 5: Solve for x
x = 731,922,394,195.97/1,138,428.40 - Step 6: Final answer
x = 642,923.52
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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.