Finding the Fourth Proportional to 261.44, 390.23 and 239.79
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Solution
The fourth proportional to 261.44, 390.23 and 239.79 is: 357.92
Step by Step Solution
- Step 1: Write the proportion equation
261.44 : 390.23 = 239.79 : x - Step 2: Convert to fraction form
261.44/390.23 = 239.79/x - Step 3: Cross multiply
261.44x = 390.23 × 239.79 - Step 4: Simplify right side
261.44x = 93,572.05 - Step 5: Solve for x
x = 93,572.05/261.44 - Step 6: Final answer
x = 357.92
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.