Finding the Fourth Proportional to 247.89, 371.72 and 145.23
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Solution
The fourth proportional to 247.89, 371.72 and 145.23 is: 217.77
Step by Step Solution
- Step 1: Write the proportion equation
247.89 : 371.72 = 145.23 : x - Step 2: Convert to fraction form
247.89/371.72 = 145.23/x - Step 3: Cross multiply
247.89x = 371.72 × 145.23 - Step 4: Simplify right side
247.89x = 53,983.86 - Step 5: Solve for x
x = 53,983.86/247.89 - Step 6: Final answer
x = 217.77
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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.