Finding the Fourth Proportional to 721,129.44, 995,119.56 and 398,820.72
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Solution
The fourth proportional to 721,129.44, 995,119.56 and 398,820.72 is: 550,350.99
Step by Step Solution
- Step 1: Write the proportion equation
721,129.44 : 995,119.56 = 398,820.72 : x - Step 2: Convert to fraction form
721,129.44/995,119.56 = 398,820.72/x - Step 3: Cross multiply
721,129.44x = 995,119.56 × 398,820.72 - Step 4: Simplify right side
721,129.44x = 396,874,299,405.28 - Step 5: Solve for x
x = 396,874,299,405.28/721,129.44 - Step 6: Final answer
x = 550,350.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.