Finding the Fourth Proportional to 312.33, 431.30 and 201.99
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Solution
The fourth proportional to 312.33, 431.30 and 201.99 is: 278.93
Step by Step Solution
- Step 1: Write the proportion equation
312.33 : 431.30 = 201.99 : x - Step 2: Convert to fraction form
312.33/431.30 = 201.99/x - Step 3: Cross multiply
312.33x = 431.30 × 201.99 - Step 4: Simplify right side
312.33x = 87,118.29 - Step 5: Solve for x
x = 87,118.29/312.33 - Step 6: Final answer
x = 278.93
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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.