Finding the Fourth Proportional to 202.80, 279.84 and 129.08
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Solution
The fourth proportional to 202.80, 279.84 and 129.08 is: 178.12
Step by Step Solution
- Step 1: Write the proportion equation
202.80 : 279.84 = 129.08 : x - Step 2: Convert to fraction form
202.80/279.84 = 129.08/x - Step 3: Cross multiply
202.80x = 279.84 × 129.08 - Step 4: Simplify right side
202.80x = 36,121.75 - Step 5: Solve for x
x = 36,121.75/202.80 - Step 6: Final answer
x = 178.12
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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.