Finding the Fourth Proportional to 397,686.40, 548,816.62 and 225,615.98
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Solution
The fourth proportional to 397,686.40, 548,816.62 and 225,615.98 is: 311,355.38
Step by Step Solution
- Step 1: Write the proportion equation
397,686.40 : 548,816.62 = 225,615.98 : x - Step 2: Convert to fraction form
397,686.40/548,816.62 = 225,615.98/x - Step 3: Cross multiply
397,686.40x = 548,816.62 × 225,615.98 - Step 4: Simplify right side
397,686.40x = 123,821,799,561.59 - Step 5: Solve for x
x = 123,821,799,561.59/397,686.40 - Step 6: Final answer
x = 311,355.38
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.