Finding the Fourth Proportional to 280,612.80, 420,919.20 and 168,419.70
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Solution
The fourth proportional to 280,612.80, 420,919.20 and 168,419.70 is: 252,629.55
Step by Step Solution
- Step 1: Write the proportion equation
280,612.80 : 420,919.20 = 168,419.70 : x - Step 2: Convert to fraction form
280,612.80/420,919.20 = 168,419.70/x - Step 3: Cross multiply
280,612.80x = 420,919.20 × 168,419.70 - Step 4: Simplify right side
280,612.80x = 70,891,085,388.24 - Step 5: Solve for x
x = 70,891,085,388.24/280,612.80 - Step 6: Final answer
x = 252,629.55
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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.