Finding the Fourth Proportional to 261.87, 392.93 and 122.99
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Solution
The fourth proportional to 261.87, 392.93 and 122.99 is: 184.54
Step by Step Solution
- Step 1: Write the proportion equation
261.87 : 392.93 = 122.99 : x - Step 2: Convert to fraction form
261.87/392.93 = 122.99/x - Step 3: Cross multiply
261.87x = 392.93 × 122.99 - Step 4: Simplify right side
261.87x = 48,323.88 - Step 5: Solve for x
x = 48,323.88/261.87 - Step 6: Final answer
x = 184.54
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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.