Finding the Fourth Proportional to 280,169.92, 420,257.74 and 80,489.80
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Solution
The fourth proportional to 280,169.92, 420,257.74 and 80,489.80 is: 120,735.52
Step by Step Solution
- Step 1: Write the proportion equation
280,169.92 : 420,257.74 = 80,489.80 : x - Step 2: Convert to fraction form
280,169.92/420,257.74 = 80,489.80/x - Step 3: Cross multiply
280,169.92x = 420,257.74 × 80,489.80 - Step 4: Simplify right side
280,169.92x = 33,826,461,441.05 - Step 5: Solve for x
x = 33,826,461,441.05/280,169.92 - Step 6: Final answer
x = 120,735.52
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1.5x scale
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.