Finding the Fourth Proportional to 261.96, 392.95 and 107.91
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Solution
The fourth proportional to 261.96, 392.95 and 107.91 is: 161.87
Step by Step Solution
- Step 1: Write the proportion equation
261.96 : 392.95 = 107.91 : x - Step 2: Convert to fraction form
261.96/392.95 = 107.91/x - Step 3: Cross multiply
261.96x = 392.95 × 107.91 - Step 4: Simplify right side
261.96x = 42,403.23 - Step 5: Solve for x
x = 42,403.23/261.96 - Step 6: Final answer
x = 161.87
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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.