Finding the Fourth Proportional to 257.44, 386.26 and 135.80
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Solution
The fourth proportional to 257.44, 386.26 and 135.80 is: 203.75
Step by Step Solution
- Step 1: Write the proportion equation
257.44 : 386.26 = 135.80 : x - Step 2: Convert to fraction form
257.44/386.26 = 135.80/x - Step 3: Cross multiply
257.44x = 386.26 × 135.80 - Step 4: Simplify right side
257.44x = 52,454.11 - Step 5: Solve for x
x = 52,454.11/257.44 - Step 6: Final answer
x = 203.75
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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.