Finding the Fourth Proportional to 386.36, 533.18 and 211.70
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Solution
The fourth proportional to 386.36, 533.18 and 211.70 is: 292.15
Step by Step Solution
- Step 1: Write the proportion equation
386.36 : 533.18 = 211.70 : x - Step 2: Convert to fraction form
386.36/533.18 = 211.70/x - Step 3: Cross multiply
386.36x = 533.18 × 211.70 - Step 4: Simplify right side
386.36x = 112,874.21 - Step 5: Solve for x
x = 112,874.21/386.36 - Step 6: Final answer
x = 292.15
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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.