Finding the Fourth Proportional to 405,879.20, 608,905.20 and 125,424.80
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Solution
The fourth proportional to 405,879.20, 608,905.20 and 125,424.80 is: 188,163.90
Step by Step Solution
- Step 1: Write the proportion equation
405,879.20 : 608,905.20 = 125,424.80 : x - Step 2: Convert to fraction form
405,879.20/608,905.20 = 125,424.80/x - Step 3: Cross multiply
405,879.20x = 608,905.20 × 125,424.80 - Step 4: Simplify right side
405,879.20x = 76,371,812,928.96 - Step 5: Solve for x
x = 76,371,812,928.96/405,879.20 - Step 6: Final answer
x = 188,163.90
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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.