Finding the Fourth Proportional to 202.26, 278.94 and 136.80
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Solution
The fourth proportional to 202.26, 278.94 and 136.80 is: 188.66
Step by Step Solution
- Step 1: Write the proportion equation
202.26 : 278.94 = 136.80 : x - Step 2: Convert to fraction form
202.26/278.94 = 136.80/x - Step 3: Cross multiply
202.26x = 278.94 × 136.80 - Step 4: Simplify right side
202.26x = 38,158.99 - Step 5: Solve for x
x = 38,158.99/202.26 - Step 6: Final answer
x = 188.66
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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.