Finding the Fourth Proportional to 331,129.80, 496,694.70 and 81,811.80
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Solution
The fourth proportional to 331,129.80, 496,694.70 and 81,811.80 is: 122,717.70
Step by Step Solution
- Step 1: Write the proportion equation
331,129.80 : 496,694.70 = 81,811.80 : x - Step 2: Convert to fraction form
331,129.80/496,694.70 = 81,811.80/x - Step 3: Cross multiply
331,129.80x = 496,694.70 × 81,811.80 - Step 4: Simplify right side
331,129.80x = 40,635,487,457.46 - Step 5: Solve for x
x = 40,635,487,457.46/331,129.80 - Step 6: Final answer
x = 122,717.70
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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.