Finding the Fourth Proportional to 718,816.28, 991,963.68 and 396,546.44
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Solution
The fourth proportional to 718,816.28, 991,963.68 and 396,546.44 is: 547,232.55
Step by Step Solution
- Step 1: Write the proportion equation
718,816.28 : 991,963.68 = 396,546.44 : x - Step 2: Convert to fraction form
718,816.28/991,963.68 = 396,546.44/x - Step 3: Cross multiply
718,816.28x = 991,963.68 × 396,546.44 - Step 4: Simplify right side
718,816.28x = 393,359,665,913.30 - Step 5: Solve for x
x = 393,359,665,913.30/718,816.28 - Step 6: Final answer
x = 547,232.55
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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.