Finding the Fourth Proportional to 386.70, 580.10 and 126.63
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Solution
The fourth proportional to 386.70, 580.10 and 126.63 is: 189.96
Step by Step Solution
- Step 1: Write the proportion equation
386.70 : 580.10 = 126.63 : x - Step 2: Convert to fraction form
386.70/580.10 = 126.63/x - Step 3: Cross multiply
386.70x = 580.10 × 126.63 - Step 4: Simplify right side
386.70x = 73,458.06 - Step 5: Solve for x
x = 73,458.06/386.70 - Step 6: Final answer
x = 189.96
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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.