Finding the Fourth Proportional to 309.68, 427.42 and 193.26
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Solution
The fourth proportional to 309.68, 427.42 and 193.26 is: 266.74
Step by Step Solution
- Step 1: Write the proportion equation
309.68 : 427.42 = 193.26 : x - Step 2: Convert to fraction form
309.68/427.42 = 193.26/x - Step 3: Cross multiply
309.68x = 427.42 × 193.26 - Step 4: Simplify right side
309.68x = 82,603.19 - Step 5: Solve for x
x = 82,603.19/309.68 - Step 6: Final answer
x = 266.74
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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.