Finding the Fourth Proportional to 258.08, 387.36 and 177.20
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Solution
The fourth proportional to 258.08, 387.36 and 177.20 is: 265.96
Step by Step Solution
- Step 1: Write the proportion equation
258.08 : 387.36 = 177.20 : x - Step 2: Convert to fraction form
258.08/387.36 = 177.20/x - Step 3: Cross multiply
258.08x = 387.36 × 177.20 - Step 4: Simplify right side
258.08x = 68,640.19 - Step 5: Solve for x
x = 68,640.19/258.08 - Step 6: Final answer
x = 265.96
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.