Finding the Fourth Proportional to 461.21, 636.19 and 274.58
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Solution
The fourth proportional to 461.21, 636.19 and 274.58 is: 378.75
Step by Step Solution
- Step 1: Write the proportion equation
461.21 : 636.19 = 274.58 : x - Step 2: Convert to fraction form
461.21/636.19 = 274.58/x - Step 3: Cross multiply
461.21x = 636.19 × 274.58 - Step 4: Simplify right side
461.21x = 174,681.87 - Step 5: Solve for x
x = 174,681.87/461.21 - Step 6: Final answer
x = 378.75
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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.