Finding the Fourth Proportional to 202.62, 279.64 and 122.88
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Solution
The fourth proportional to 202.62, 279.64 and 122.88 is: 169.59
Step by Step Solution
- Step 1: Write the proportion equation
202.62 : 279.64 = 122.88 : x - Step 2: Convert to fraction form
202.62/279.64 = 122.88/x - Step 3: Cross multiply
202.62x = 279.64 × 122.88 - Step 4: Simplify right side
202.62x = 34,362.16 - Step 5: Solve for x
x = 34,362.16/202.62 - Step 6: Final answer
x = 169.59
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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.