Finding the Fourth Proportional to 239.18, 358.70 and 74.61
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Solution
The fourth proportional to 239.18, 358.70 and 74.61 is: 111.89
Step by Step Solution
- Step 1: Write the proportion equation
239.18 : 358.70 = 74.61 : x - Step 2: Convert to fraction form
239.18/358.70 = 74.61/x - Step 3: Cross multiply
239.18x = 358.70 × 74.61 - Step 4: Simplify right side
239.18x = 26,762.23 - Step 5: Solve for x
x = 26,762.23/239.18 - Step 6: Final answer
x = 111.89
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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.