Finding the Fourth Proportional to 261.99, 392.91 and 107.88
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Solution
The fourth proportional to 261.99, 392.91 and 107.88 is: 161.79
Step by Step Solution
- Step 1: Write the proportion equation
261.99 : 392.91 = 107.88 : x - Step 2: Convert to fraction form
261.99/392.91 = 107.88/x - Step 3: Cross multiply
261.99x = 392.91 × 107.88 - Step 4: Simplify right side
261.99x = 42,387.13 - Step 5: Solve for x
x = 42,387.13/261.99 - Step 6: Final answer
x = 161.79
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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.