Finding the Fourth Proportional to 718,443.99, 991,431.45 and 396,153.99
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Solution
The fourth proportional to 718,443.99, 991,431.45 and 396,153.99 is: 546,680.79
Step by Step Solution
- Step 1: Write the proportion equation
718,443.99 : 991,431.45 = 396,153.99 : x - Step 2: Convert to fraction form
718,443.99/991,431.45 = 396,153.99/x - Step 3: Cross multiply
718,443.99x = 991,431.45 × 396,153.99 - Step 4: Simplify right side
718,443.99x = 392,759,524,728.99 - Step 5: Solve for x
x = 392,759,524,728.99/718,443.99 - Step 6: Final answer
x = 546,680.79
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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.