Finding the Fourth Proportional to 178.36, 246.21 and 138.91
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Solution
The fourth proportional to 178.36, 246.21 and 138.91 is: 191.75
Step by Step Solution
- Step 1: Write the proportion equation
178.36 : 246.21 = 138.91 : x - Step 2: Convert to fraction form
178.36/246.21 = 138.91/x - Step 3: Cross multiply
178.36x = 246.21 × 138.91 - Step 4: Simplify right side
178.36x = 34,201.03 - Step 5: Solve for x
x = 34,201.03/178.36 - Step 6: Final answer
x = 191.75
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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.