Finding the Fourth Proportional to 207.70, 286.64 and 129.07
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Solution
The fourth proportional to 207.70, 286.64 and 129.07 is: 178.12
Step by Step Solution
- Step 1: Write the proportion equation
207.70 : 286.64 = 129.07 : x - Step 2: Convert to fraction form
207.70/286.64 = 129.07/x - Step 3: Cross multiply
207.70x = 286.64 × 129.07 - Step 4: Simplify right side
207.70x = 36,995.72 - Step 5: Solve for x
x = 36,995.72/207.70 - Step 6: Final answer
x = 178.12
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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.