Finding the Fourth Proportional to 266.02, 398.79 and 128.99
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Solution
The fourth proportional to 266.02, 398.79 and 128.99 is: 193.37
Step by Step Solution
- Step 1: Write the proportion equation
266.02 : 398.79 = 128.99 : x - Step 2: Convert to fraction form
266.02/398.79 = 128.99/x - Step 3: Cross multiply
266.02x = 398.79 × 128.99 - Step 4: Simplify right side
266.02x = 51,440.92 - Step 5: Solve for x
x = 51,440.92/266.02 - Step 6: Final answer
x = 193.37
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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.