Finding the Fourth Proportional to 207.36, 286.18 and 129.74
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Solution
The fourth proportional to 207.36, 286.18 and 129.74 is: 179.06
Step by Step Solution
- Step 1: Write the proportion equation
207.36 : 286.18 = 129.74 : x - Step 2: Convert to fraction form
207.36/286.18 = 129.74/x - Step 3: Cross multiply
207.36x = 286.18 × 129.74 - Step 4: Simplify right side
207.36x = 37,128.99 - Step 5: Solve for x
x = 37,128.99/207.36 - Step 6: Final answer
x = 179.06
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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.