Finding the Fourth Proportional to 266.64, 399.84 and 129.75
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Solution
The fourth proportional to 266.64, 399.84 and 129.75 is: 194.57
Step by Step Solution
- Step 1: Write the proportion equation
266.64 : 399.84 = 129.75 : x - Step 2: Convert to fraction form
266.64/399.84 = 129.75/x - Step 3: Cross multiply
266.64x = 399.84 × 129.75 - Step 4: Simplify right side
266.64x = 51,879.24 - Step 5: Solve for x
x = 51,879.24/266.64 - Step 6: Final answer
x = 194.57
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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.