Finding the Fourth Proportional to 261.77, 392.99 and 221.44
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Solution
The fourth proportional to 261.77, 392.99 and 221.44 is: 332.45
Step by Step Solution
- Step 1: Write the proportion equation
261.77 : 392.99 = 221.44 : x - Step 2: Convert to fraction form
261.77/392.99 = 221.44/x - Step 3: Cross multiply
261.77x = 392.99 × 221.44 - Step 4: Simplify right side
261.77x = 87,024.69 - Step 5: Solve for x
x = 87,024.69/261.77 - Step 6: Final answer
x = 332.45
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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.