Finding the Fourth Proportional to 317.68, 438.26 and 186.68
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Solution
The fourth proportional to 317.68, 438.26 and 186.68 is: 257.54
Step by Step Solution
- Step 1: Write the proportion equation
317.68 : 438.26 = 186.68 : x - Step 2: Convert to fraction form
317.68/438.26 = 186.68/x - Step 3: Cross multiply
317.68x = 438.26 × 186.68 - Step 4: Simplify right side
317.68x = 81,814.38 - Step 5: Solve for x
x = 81,814.38/317.68 - Step 6: Final answer
x = 257.54
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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.