Finding the Fourth Proportional to 388.41, 536.21 and 318.65
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Solution
The fourth proportional to 388.41, 536.21 and 318.65 is: 439.90
Step by Step Solution
- Step 1: Write the proportion equation
388.41 : 536.21 = 318.65 : x - Step 2: Convert to fraction form
388.41/536.21 = 318.65/x - Step 3: Cross multiply
388.41x = 536.21 × 318.65 - Step 4: Simplify right side
388.41x = 170,860.24 - Step 5: Solve for x
x = 170,860.24/388.41 - Step 6: Final answer
x = 439.90
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.