Finding the Fourth Proportional to 206.60, 309.68 and 84.74
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Solution
The fourth proportional to 206.60, 309.68 and 84.74 is: 127.02
Step by Step Solution
- Step 1: Write the proportion equation
206.60 : 309.68 = 84.74 : x - Step 2: Convert to fraction form
206.60/309.68 = 84.74/x - Step 3: Cross multiply
206.60x = 309.68 × 84.74 - Step 4: Simplify right side
206.60x = 26,242.28 - Step 5: Solve for x
x = 26,242.28/206.60 - Step 6: Final answer
x = 127.02
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.