Finding the Fourth Proportional to 261.97, 392.99 and 105.79
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Solution
The fourth proportional to 261.97, 392.99 and 105.79 is: 158.71
Step by Step Solution
- Step 1: Write the proportion equation
261.97 : 392.99 = 105.79 : x - Step 2: Convert to fraction form
261.97/392.99 = 105.79/x - Step 3: Cross multiply
261.97x = 392.99 × 105.79 - Step 4: Simplify right side
261.97x = 41,575.71 - Step 5: Solve for x
x = 41,575.71/261.97 - Step 6: Final answer
x = 158.71
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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.