Finding the Fourth Proportional to 1,431,612.18, 2,147,418.67 and 420,734.08
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Solution
The fourth proportional to 1,431,612.18, 2,147,418.67 and 420,734.08 is: 631,101.24
Step by Step Solution
- Step 1: Write the proportion equation
1,431,612.18 : 2,147,418.67 = 420,734.08 : x - Step 2: Convert to fraction form
1,431,612.18/2,147,418.67 = 420,734.08/x - Step 3: Cross multiply
1,431,612.18x = 2,147,418.67 × 420,734.08 - Step 4: Simplify right side
1,431,612.18x = 903,492,222,496.34 - Step 5: Solve for x
x = 903,492,222,496.34/1,431,612.18 - Step 6: Final answer
x = 631,101.24
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.