Finding the Fourth Proportional to 691.21, 954 and 396.67
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Solution
The fourth proportional to 691.21, 954 and 396.67 is: 547.48
Step by Step Solution
- Step 1: Write the proportion equation
691.21 : 954 = 396.67 : x - Step 2: Convert to fraction form
691.21/954 = 396.67/x - Step 3: Cross multiply
691.21x = 954 × 396.67 - Step 4: Simplify right side
691.21x = 378,423.18 - Step 5: Solve for x
x = 378,423.18/691.21 - Step 6: Final answer
x = 547.48
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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.