Finding the Fourth Proportional to 252.65, 378.95 and 79.31
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Solution
The fourth proportional to 252.65, 378.95 and 79.31 is: 118.96
Step by Step Solution
- Step 1: Write the proportion equation
252.65 : 378.95 = 79.31 : x - Step 2: Convert to fraction form
252.65/378.95 = 79.31/x - Step 3: Cross multiply
252.65x = 378.95 × 79.31 - Step 4: Simplify right side
252.65x = 30,055.08 - Step 5: Solve for x
x = 30,055.08/252.65 - Step 6: Final answer
x = 118.96
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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.