Finding the Fourth Proportional to 202.74, 279.84 and 129.02
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Solution
The fourth proportional to 202.74, 279.84 and 129.02 is: 178.09
Step by Step Solution
- Step 1: Write the proportion equation
202.74 : 279.84 = 129.02 : x - Step 2: Convert to fraction form
202.74/279.84 = 129.02/x - Step 3: Cross multiply
202.74x = 279.84 × 129.02 - Step 4: Simplify right side
202.74x = 36,104.96 - Step 5: Solve for x
x = 36,104.96/202.74 - Step 6: Final answer
x = 178.09
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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.