Finding the Fourth Proportional to 239.13, 358.74 and 76.80
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Solution
The fourth proportional to 239.13, 358.74 and 76.80 is: 115.21
Step by Step Solution
- Step 1: Write the proportion equation
239.13 : 358.74 = 76.80 : x - Step 2: Convert to fraction form
239.13/358.74 = 76.80/x - Step 3: Cross multiply
239.13x = 358.74 × 76.80 - Step 4: Simplify right side
239.13x = 27,551.23 - Step 5: Solve for x
x = 27,551.23/239.13 - Step 6: Final answer
x = 115.21
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.