Finding the Fourth Proportional to 261,157.53, 391,736.42 and 172,390.28
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Solution
The fourth proportional to 261,157.53, 391,736.42 and 172,390.28 is: 258,585.50
Step by Step Solution
- Step 1: Write the proportion equation
261,157.53 : 391,736.42 = 172,390.28 : x - Step 2: Convert to fraction form
261,157.53/391,736.42 = 172,390.28/x - Step 3: Cross multiply
261,157.53x = 391,736.42 × 172,390.28 - Step 4: Simplify right side
261,157.53x = 67,531,550,268.05 - Step 5: Solve for x
x = 67,531,550,268.05/261,157.53 - Step 6: Final answer
x = 258,585.50
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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.