Finding the Fourth Proportional to 355.24, 490.08 and 257.08
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Solution
The fourth proportional to 355.24, 490.08 and 257.08 is: 354.66
Step by Step Solution
- Step 1: Write the proportion equation
355.24 : 490.08 = 257.08 : x - Step 2: Convert to fraction form
355.24/490.08 = 257.08/x - Step 3: Cross multiply
355.24x = 490.08 × 257.08 - Step 4: Simplify right side
355.24x = 125,989.77 - Step 5: Solve for x
x = 125,989.77/355.24 - Step 6: Final answer
x = 354.66
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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.