Finding the Fourth Proportional to 239.25, 330.21 and 135.75
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Solution
The fourth proportional to 239.25, 330.21 and 135.75 is: 187.36
Step by Step Solution
- Step 1: Write the proportion equation
239.25 : 330.21 = 135.75 : x - Step 2: Convert to fraction form
239.25/330.21 = 135.75/x - Step 3: Cross multiply
239.25x = 330.21 × 135.75 - Step 4: Simplify right side
239.25x = 44,826.01 - Step 5: Solve for x
x = 44,826.01/239.25 - Step 6: Final answer
x = 187.36
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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.