Finding the Fourth Proportional to 312.75, 431.91 and 234.99
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Solution
The fourth proportional to 312.75, 431.91 and 234.99 is: 324.52
Step by Step Solution
- Step 1: Write the proportion equation
312.75 : 431.91 = 234.99 : x - Step 2: Convert to fraction form
312.75/431.91 = 234.99/x - Step 3: Cross multiply
312.75x = 431.91 × 234.99 - Step 4: Simplify right side
312.75x = 101,494.53 - Step 5: Solve for x
x = 101,494.53/312.75 - Step 6: Final answer
x = 324.52
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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.