Finding the Fourth Proportional to 791.26, 1,186.88 and 278.26
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Solution
The fourth proportional to 791.26, 1,186.88 and 278.26 is: 417.39
Step by Step Solution
- Step 1: Write the proportion equation
791.26 : 1,186.88 = 278.26 : x - Step 2: Convert to fraction form
791.26/1,186.88 = 278.26/x - Step 3: Cross multiply
791.26x = 1,186.88 × 278.26 - Step 4: Simplify right side
791.26x = 330,261.23 - Step 5: Solve for x
x = 330,261.23/791.26 - Step 6: Final answer
x = 417.39
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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.