Finding the Fourth Proportional to 207.41, 286.11 and 128.67
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Solution
The fourth proportional to 207.41, 286.11 and 128.67 is: 177.50
Step by Step Solution
- Step 1: Write the proportion equation
207.41 : 286.11 = 128.67 : x - Step 2: Convert to fraction form
207.41/286.11 = 128.67/x - Step 3: Cross multiply
207.41x = 286.11 × 128.67 - Step 4: Simplify right side
207.41x = 36,813.77 - Step 5: Solve for x
x = 36,813.77/207.41 - Step 6: Final answer
x = 177.50
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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.