Finding the Fourth Proportional to 280,092.80, 420,139.20 and 217,107.20
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Solution
The fourth proportional to 280,092.80, 420,139.20 and 217,107.20 is: 325,660.80
Step by Step Solution
- Step 1: Write the proportion equation
280,092.80 : 420,139.20 = 217,107.20 : x - Step 2: Convert to fraction form
280,092.80/420,139.20 = 217,107.20/x - Step 3: Cross multiply
280,092.80x = 420,139.20 × 217,107.20 - Step 4: Simplify right side
280,092.80x = 91,215,245,322.24 - Step 5: Solve for x
x = 91,215,245,322.24/280,092.80 - Step 6: Final answer
x = 325,660.80
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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.