Finding the Fourth Proportional to 207.68, 286.62 and 129.01
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Solution
The fourth proportional to 207.68, 286.62 and 129.01 is: 178.04
Step by Step Solution
- Step 1: Write the proportion equation
207.68 : 286.62 = 129.01 : x - Step 2: Convert to fraction form
207.68/286.62 = 129.01/x - Step 3: Cross multiply
207.68x = 286.62 × 129.01 - Step 4: Simplify right side
207.68x = 36,976.13 - Step 5: Solve for x
x = 36,976.13/207.68 - Step 6: Final answer
x = 178.04
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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.