Finding the Fourth Proportional to 318.60, 439.80 and 202.08
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Solution
The fourth proportional to 318.60, 439.80 and 202.08 is: 278.95
Step by Step Solution
- Step 1: Write the proportion equation
318.60 : 439.80 = 202.08 : x - Step 2: Convert to fraction form
318.60/439.80 = 202.08/x - Step 3: Cross multiply
318.60x = 439.80 × 202.08 - Step 4: Simplify right side
318.60x = 88,874.78 - Step 5: Solve for x
x = 88,874.78/318.60 - Step 6: Final answer
x = 278.95
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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.