Finding the Fourth Proportional to 309.76, 427.67 and 230.99
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Solution
The fourth proportional to 309.76, 427.67 and 230.99 is: 318.92
Step by Step Solution
- Step 1: Write the proportion equation
309.76 : 427.67 = 230.99 : x - Step 2: Convert to fraction form
309.76/427.67 = 230.99/x - Step 3: Cross multiply
309.76x = 427.67 × 230.99 - Step 4: Simplify right side
309.76x = 98,787.49 - Step 5: Solve for x
x = 98,787.49/309.76 - Step 6: Final answer
x = 318.92
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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.