Finding the Fourth Proportional to 286.20, 394.84 and 202.30
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Solution
The fourth proportional to 286.20, 394.84 and 202.30 is: 279.09
Step by Step Solution
- Step 1: Write the proportion equation
286.20 : 394.84 = 202.30 : x - Step 2: Convert to fraction form
286.20/394.84 = 202.30/x - Step 3: Cross multiply
286.20x = 394.84 × 202.30 - Step 4: Simplify right side
286.20x = 79,876.13 - Step 5: Solve for x
x = 79,876.13/286.20 - Step 6: Final answer
x = 279.09
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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.