Finding the Fourth Proportional to 207.24, 286.07 and 128.62
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Solution
The fourth proportional to 207.24, 286.07 and 128.62 is: 177.55
Step by Step Solution
- Step 1: Write the proportion equation
207.24 : 286.07 = 128.62 : x - Step 2: Convert to fraction form
207.24/286.07 = 128.62/x - Step 3: Cross multiply
207.24x = 286.07 × 128.62 - Step 4: Simplify right side
207.24x = 36,794.04 - Step 5: Solve for x
x = 36,794.04/207.24 - Step 6: Final answer
x = 177.55
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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.