Finding the Fourth Proportional to 312,420.42, 431,140.41 and 169,180.62
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Solution
The fourth proportional to 312,420.42, 431,140.41 and 169,180.62 is: 233,469.38
Step by Step Solution
- Step 1: Write the proportion equation
312,420.42 : 431,140.41 = 169,180.62 : x - Step 2: Convert to fraction form
312,420.42/431,140.41 = 169,180.62/x - Step 3: Cross multiply
312,420.42x = 431,140.41 × 169,180.62 - Step 4: Simplify right side
312,420.42x = 72,940,601,870.85 - Step 5: Solve for x
x = 72,940,601,870.85/312,420.42 - Step 6: Final answer
x = 233,469.38
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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.