Finding the Fourth Proportional to 306,115.20, 459,245.70 and 128,530.80
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Solution
The fourth proportional to 306,115.20, 459,245.70 and 128,530.80 is: 192,826.81
Step by Step Solution
- Step 1: Write the proportion equation
306,115.20 : 459,245.70 = 128,530.80 : x - Step 2: Convert to fraction form
306,115.20/459,245.70 = 128,530.80/x - Step 3: Cross multiply
306,115.20x = 459,245.70 × 128,530.80 - Step 4: Simplify right side
306,115.20x = 59,027,217,217.56 - Step 5: Solve for x
x = 59,027,217,217.56/306,115.20 - Step 6: Final answer
x = 192,826.81
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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.