Finding the Fourth Proportional to 720,621.11, 994,414.39 and 398,311.99
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Solution
The fourth proportional to 720,621.11, 994,414.39 and 398,311.99 is: 549,646.91
Step by Step Solution
- Step 1: Write the proportion equation
720,621.11 : 994,414.39 = 398,311.99 : x - Step 2: Convert to fraction form
720,621.11/994,414.39 = 398,311.99/x - Step 3: Cross multiply
720,621.11x = 994,414.39 × 398,311.99 - Step 4: Simplify right side
720,621.11x = 396,087,171,083.72 - Step 5: Solve for x
x = 396,087,171,083.72/720,621.11 - Step 6: Final answer
x = 549,646.91
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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.