Finding the Fourth Proportional to 307.68, 461.44 and 91.28
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Solution
The fourth proportional to 307.68, 461.44 and 91.28 is: 136.90
Step by Step Solution
- Step 1: Write the proportion equation
307.68 : 461.44 = 91.28 : x - Step 2: Convert to fraction form
307.68/461.44 = 91.28/x - Step 3: Cross multiply
307.68x = 461.44 × 91.28 - Step 4: Simplify right side
307.68x = 42,120.24 - Step 5: Solve for x
x = 42,120.24/307.68 - Step 6: Final answer
x = 136.90
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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.