Finding the Fourth Proportional to 260.21, 390.09 and 115.88
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Solution
The fourth proportional to 260.21, 390.09 and 115.88 is: 173.72
Step by Step Solution
- Step 1: Write the proportion equation
260.21 : 390.09 = 115.88 : x - Step 2: Convert to fraction form
260.21/390.09 = 115.88/x - Step 3: Cross multiply
260.21x = 390.09 × 115.88 - Step 4: Simplify right side
260.21x = 45,203.63 - Step 5: Solve for x
x = 45,203.63/260.21 - Step 6: Final answer
x = 173.72
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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.