Finding the Fourth Proportional to 285.10, 393.18 and 186.68
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Solution
The fourth proportional to 285.10, 393.18 and 186.68 is: 257.45
Step by Step Solution
- Step 1: Write the proportion equation
285.10 : 393.18 = 186.68 : x - Step 2: Convert to fraction form
285.10/393.18 = 186.68/x - Step 3: Cross multiply
285.10x = 393.18 × 186.68 - Step 4: Simplify right side
285.10x = 73,398.84 - Step 5: Solve for x
x = 73,398.84/285.10 - Step 6: Final answer
x = 257.45
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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.