Finding the Fourth Proportional to 318.31, 439.09 and 207.65
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Solution
The fourth proportional to 318.31, 439.09 and 207.65 is: 286.45
Step by Step Solution
- Step 1: Write the proportion equation
318.31 : 439.09 = 207.65 : x - Step 2: Convert to fraction form
318.31/439.09 = 207.65/x - Step 3: Cross multiply
318.31x = 439.09 × 207.65 - Step 4: Simplify right side
318.31x = 91,177.62 - Step 5: Solve for x
x = 91,177.62/318.31 - Step 6: Final answer
x = 286.45
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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.