Finding the Fourth Proportional to 280.21, 386.62 and 191.75
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Solution
The fourth proportional to 280.21, 386.62 and 191.75 is: 264.57
Step by Step Solution
- Step 1: Write the proportion equation
280.21 : 386.62 = 191.75 : x - Step 2: Convert to fraction form
280.21/386.62 = 191.75/x - Step 3: Cross multiply
280.21x = 386.62 × 191.75 - Step 4: Simplify right side
280.21x = 74,135.23 - Step 5: Solve for x
x = 74,135.23/280.21 - Step 6: Final answer
x = 264.57
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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.