Finding the Fourth Proportional to 239.23, 358.80 and 76.87
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Solution
The fourth proportional to 239.23, 358.80 and 76.87 is: 115.29
Step by Step Solution
- Step 1: Write the proportion equation
239.23 : 358.80 = 76.87 : x - Step 2: Convert to fraction form
239.23/358.80 = 76.87/x - Step 3: Cross multiply
239.23x = 358.80 × 76.87 - Step 4: Simplify right side
239.23x = 27,580.96 - Step 5: Solve for x
x = 27,580.96/239.23 - Step 6: Final answer
x = 115.29
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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.