Finding the Fourth Proportional to 427.05, 640.26 and 207.63
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Solution
The fourth proportional to 427.05, 640.26 and 207.63 is: 311.29
Step by Step Solution
- Step 1: Write the proportion equation
427.05 : 640.26 = 207.63 : x - Step 2: Convert to fraction form
427.05/640.26 = 207.63/x - Step 3: Cross multiply
427.05x = 640.26 × 207.63 - Step 4: Simplify right side
427.05x = 132,937.18 - Step 5: Solve for x
x = 132,937.18/427.05 - Step 6: Final answer
x = 311.29
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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.