Finding the Fourth Proportional to 660,716.20, 991,074.30 and 394,995.70
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Solution
The fourth proportional to 660,716.20, 991,074.30 and 394,995.70 is: 592,493.55
Step by Step Solution
- Step 1: Write the proportion equation
660,716.20 : 991,074.30 = 394,995.70 : x - Step 2: Convert to fraction form
660,716.20/991,074.30 = 394,995.70/x - Step 3: Cross multiply
660,716.20x = 991,074.30 × 394,995.70 - Step 4: Simplify right side
660,716.20x = 391,470,086,880.51 - Step 5: Solve for x
x = 391,470,086,880.51/660,716.20 - Step 6: Final answer
x = 592,493.55
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Double scale
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Similar ratio
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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.