Finding the Fourth Proportional to 394,709.23, 591,924.12 and 128,420.11
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Solution
The fourth proportional to 394,709.23, 591,924.12 and 128,420.11 is: 192,584.70
Step by Step Solution
- Step 1: Write the proportion equation
394,709.23 : 591,924.12 = 128,420.11 : x - Step 2: Convert to fraction form
394,709.23/591,924.12 = 128,420.11/x - Step 3: Cross multiply
394,709.23x = 591,924.12 × 128,420.11 - Step 4: Simplify right side
394,709.23x = 76,014,960,602.05 - Step 5: Solve for x
x = 76,014,960,602.05/394,709.23 - Step 6: Final answer
x = 192,584.70
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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.