Finding the Fourth Proportional to 312,418.27, 431,137.43 and 169,178.42
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Solution
The fourth proportional to 312,418.27, 431,137.43 and 169,178.42 is: 233,466.35
Step by Step Solution
- Step 1: Write the proportion equation
312,418.27 : 431,137.43 = 169,178.42 : x - Step 2: Convert to fraction form
312,418.27/431,137.43 = 169,178.42/x - Step 3: Cross multiply
312,418.27x = 431,137.43 × 169,178.42 - Step 4: Simplify right side
312,418.27x = 72,939,151,028.26 - Step 5: Solve for x
x = 72,939,151,028.26/312,418.27 - Step 6: Final answer
x = 233,466.35
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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.