Finding the Fourth Proportional to 421,211.75, 631,817.63 and 125,723.75
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Solution
The fourth proportional to 421,211.75, 631,817.63 and 125,723.75 is: 188,585.63
Step by Step Solution
- Step 1: Write the proportion equation
421,211.75 : 631,817.63 = 125,723.75 : x - Step 2: Convert to fraction form
421,211.75/631,817.63 = 125,723.75/x - Step 3: Cross multiply
421,211.75x = 631,817.63 × 125,723.75 - Step 4: Simplify right side
421,211.75x = 79,434,481,131.09 - Step 5: Solve for x
x = 79,434,481,131.09/421,211.75 - Step 6: Final answer
x = 188,585.63
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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.