Finding the Fourth Proportional to 245.31, 338.51 and 134.78
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Solution
The fourth proportional to 245.31, 338.51 and 134.78 is: 185.99
Step by Step Solution
- Step 1: Write the proportion equation
245.31 : 338.51 = 134.78 : x - Step 2: Convert to fraction form
245.31/338.51 = 134.78/x - Step 3: Cross multiply
245.31x = 338.51 × 134.78 - Step 4: Simplify right side
245.31x = 45,625.56 - Step 5: Solve for x
x = 45,625.56/245.31 - Step 6: Final answer
x = 185.99
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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.