Finding the Fourth Proportional to 394,296.95, 591,614.91 and 128,139.05
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Solution
The fourth proportional to 394,296.95, 591,614.91 and 128,139.05 is: 192,263.65
Step by Step Solution
- Step 1: Write the proportion equation
394,296.95 : 591,614.91 = 128,139.05 : x - Step 2: Convert to fraction form
394,296.95/591,614.91 = 128,139.05/x - Step 3: Cross multiply
394,296.95x = 591,614.91 × 128,139.05 - Step 4: Simplify right side
394,296.95x = 75,808,969,575.16 - Step 5: Solve for x
x = 75,808,969,575.16/394,296.95 - Step 6: Final answer
x = 192,263.65
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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.