Finding the Fourth Proportional to 239.28, 358.95 and 76.98
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Solution
The fourth proportional to 239.28, 358.95 and 76.98 is: 115.48
Step by Step Solution
- Step 1: Write the proportion equation
239.28 : 358.95 = 76.98 : x - Step 2: Convert to fraction form
239.28/358.95 = 76.98/x - Step 3: Cross multiply
239.28x = 358.95 × 76.98 - Step 4: Simplify right side
239.28x = 27,631.97 - Step 5: Solve for x
x = 27,631.97/239.28 - Step 6: Final answer
x = 115.48
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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.