Finding the Fourth Proportional to 318.16, 438.93 and 201.70
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Solution
The fourth proportional to 318.16, 438.93 and 201.70 is: 278.26
Step by Step Solution
- Step 1: Write the proportion equation
318.16 : 438.93 = 201.70 : x - Step 2: Convert to fraction form
318.16/438.93 = 201.70/x - Step 3: Cross multiply
318.16x = 438.93 × 201.70 - Step 4: Simplify right side
318.16x = 88,532.18 - Step 5: Solve for x
x = 88,532.18/318.16 - Step 6: Final answer
x = 278.26
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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.