Finding the Fourth Proportional to 309.64, 427.36 and 178.68
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Solution
The fourth proportional to 309.64, 427.36 and 178.68 is: 246.61
Step by Step Solution
- Step 1: Write the proportion equation
309.64 : 427.36 = 178.68 : x - Step 2: Convert to fraction form
309.64/427.36 = 178.68/x - Step 3: Cross multiply
309.64x = 427.36 × 178.68 - Step 4: Simplify right side
309.64x = 76,360.68 - Step 5: Solve for x
x = 76,360.68/309.64 - Step 6: Final answer
x = 246.61
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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.