Finding the Fourth Proportional to 266.40, 399.62 and 122.09
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Solution
The fourth proportional to 266.40, 399.62 and 122.09 is: 183.14
Step by Step Solution
- Step 1: Write the proportion equation
266.40 : 399.62 = 122.09 : x - Step 2: Convert to fraction form
266.40/399.62 = 122.09/x - Step 3: Cross multiply
266.40x = 399.62 × 122.09 - Step 4: Simplify right side
266.40x = 48,787.91 - Step 5: Solve for x
x = 48,787.91/266.40 - Step 6: Final answer
x = 183.14
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.