Finding the Fourth Proportional to 682.74, 942.18 and 387.99
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Solution
The fourth proportional to 682.74, 942.18 and 387.99 is: 535.43
Step by Step Solution
- Step 1: Write the proportion equation
682.74 : 942.18 = 387.99 : x - Step 2: Convert to fraction form
682.74/942.18 = 387.99/x - Step 3: Cross multiply
682.74x = 942.18 × 387.99 - Step 4: Simplify right side
682.74x = 365,556.42 - Step 5: Solve for x
x = 365,556.42/682.74 - Step 6: Final answer
x = 535.43
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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.