Finding the Fourth Proportional to 261.99, 392.97 and 99.66
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Solution
The fourth proportional to 261.99, 392.97 and 99.66 is: 149.48
Step by Step Solution
- Step 1: Write the proportion equation
261.99 : 392.97 = 99.66 : x - Step 2: Convert to fraction form
261.99/392.97 = 99.66/x - Step 3: Cross multiply
261.99x = 392.97 × 99.66 - Step 4: Simplify right side
261.99x = 39,163.39 - Step 5: Solve for x
x = 39,163.39/261.99 - Step 6: Final answer
x = 149.48
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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.