Finding the Fourth Proportional to 460,891.20, 691,336.80 and 128,467.20
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Solution
The fourth proportional to 460,891.20, 691,336.80 and 128,467.20 is: 192,700.80
Step by Step Solution
- Step 1: Write the proportion equation
460,891.20 : 691,336.80 = 128,467.20 : x - Step 2: Convert to fraction form
460,891.20/691,336.80 = 128,467.20/x - Step 3: Cross multiply
460,891.20x = 691,336.80 × 128,467.20 - Step 4: Simplify right side
460,891.20x = 88,814,102,952.96 - Step 5: Solve for x
x = 88,814,102,952.96/460,891.20 - Step 6: Final answer
x = 192,700.80
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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.