Finding the Fourth Proportional to 207.68, 286.51 and 136.77
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Solution
The fourth proportional to 207.68, 286.51 and 136.77 is: 188.68
Step by Step Solution
- Step 1: Write the proportion equation
207.68 : 286.51 = 136.77 : x - Step 2: Convert to fraction form
207.68/286.51 = 136.77/x - Step 3: Cross multiply
207.68x = 286.51 × 136.77 - Step 4: Simplify right side
207.68x = 39,185.63 - Step 5: Solve for x
x = 39,185.63/207.68 - Step 6: Final answer
x = 188.68
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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.