Finding the Fourth Proportional to 283.21, 390.84 and 189.79
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Solution
The fourth proportional to 283.21, 390.84 and 189.79 is: 261.92
Step by Step Solution
- Step 1: Write the proportion equation
283.21 : 390.84 = 189.79 : x - Step 2: Convert to fraction form
283.21/390.84 = 189.79/x - Step 3: Cross multiply
283.21x = 390.84 × 189.79 - Step 4: Simplify right side
283.21x = 74,177.52 - Step 5: Solve for x
x = 74,177.52/283.21 - Step 6: Final answer
x = 261.92
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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.