Finding the Fourth Proportional to 318.36, 439.26 and 207.80
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Solution
The fourth proportional to 318.36, 439.26 and 207.80 is: 286.71
Step by Step Solution
- Step 1: Write the proportion equation
318.36 : 439.26 = 207.80 : x - Step 2: Convert to fraction form
318.36/439.26 = 207.80/x - Step 3: Cross multiply
318.36x = 439.26 × 207.80 - Step 4: Simplify right side
318.36x = 91,278.23 - Step 5: Solve for x
x = 91,278.23/318.36 - Step 6: Final answer
x = 286.71
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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.