Finding the Fourth Proportional to 667,443.09, 920,817.21 and 493,431.13
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Solution
The fourth proportional to 667,443.09, 920,817.21 and 493,431.13 is: 680,746.99
Step by Step Solution
- Step 1: Write the proportion equation
667,443.09 : 920,817.21 = 493,431.13 : x - Step 2: Convert to fraction form
667,443.09/920,817.21 = 493,431.13/x - Step 3: Cross multiply
667,443.09x = 920,817.21 × 493,431.13 - Step 4: Simplify right side
667,443.09x = 454,359,876,453.75 - Step 5: Solve for x
x = 454,359,876,453.75/667,443.09 - Step 6: Final answer
x = 680,746.99
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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.