Finding the Fourth Proportional to 286.74, 395.79 and 193.79
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Solution
The fourth proportional to 286.74, 395.79 and 193.79 is: 267.49
Step by Step Solution
- Step 1: Write the proportion equation
286.74 : 395.79 = 193.79 : x - Step 2: Convert to fraction form
286.74/395.79 = 193.79/x - Step 3: Cross multiply
286.74x = 395.79 × 193.79 - Step 4: Simplify right side
286.74x = 76,700.41 - Step 5: Solve for x
x = 76,700.41/286.74 - Step 6: Final answer
x = 267.49
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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.