Finding the Fourth Proportional to 318.11, 438.85 and 207.55
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Solution
The fourth proportional to 318.11, 438.85 and 207.55 is: 286.32
Step by Step Solution
- Step 1: Write the proportion equation
318.11 : 438.85 = 207.55 : x - Step 2: Convert to fraction form
318.11/438.85 = 207.55/x - Step 3: Cross multiply
318.11x = 438.85 × 207.55 - Step 4: Simplify right side
318.11x = 91,080.09 - Step 5: Solve for x
x = 91,080.09/318.11 - Step 6: Final answer
x = 286.32
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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.