Finding the Fourth Proportional to 396,395.18, 547,021.19 and 221,965.73
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Solution
The fourth proportional to 396,395.18, 547,021.19 and 221,965.73 is: 306,310.38
Step by Step Solution
- Step 1: Write the proportion equation
396,395.18 : 547,021.19 = 221,965.73 : x - Step 2: Convert to fraction form
396,395.18/547,021.19 = 221,965.73/x - Step 3: Cross multiply
396,395.18x = 547,021.19 × 221,965.73 - Step 4: Simplify right side
396,395.18x = 121,419,955,583.63 - Step 5: Solve for x
x = 121,419,955,583.63/396,395.18 - Step 6: Final answer
x = 306,310.38
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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.