Finding the Fourth Proportional to 394,138.23, 539,971.38 and 379,378.14
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Solution
The fourth proportional to 394,138.23, 539,971.38 and 379,378.14 is: 519,749.98
Step by Step Solution
- Step 1: Write the proportion equation
394,138.23 : 539,971.38 = 379,378.14 : x - Step 2: Convert to fraction form
394,138.23/539,971.38 = 379,378.14/x - Step 3: Cross multiply
394,138.23x = 539,971.38 × 379,378.14 - Step 4: Simplify right side
394,138.23x = 204,853,337,797.63 - Step 5: Solve for x
x = 204,853,337,797.63/394,138.23 - Step 6: Final answer
x = 519,749.98
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.