Finding the Fourth Proportional to 202.87, 279.91 and 129.09
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Solution
The fourth proportional to 202.87, 279.91 and 129.09 is: 178.12
Step by Step Solution
- Step 1: Write the proportion equation
202.87 : 279.91 = 129.09 : x - Step 2: Convert to fraction form
202.87/279.91 = 129.09/x - Step 3: Cross multiply
202.87x = 279.91 × 129.09 - Step 4: Simplify right side
202.87x = 36,134.07 - Step 5: Solve for x
x = 36,134.07/202.87 - 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.