Finding the Fourth Proportional to 289.41, 434.05 and 83.99
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Solution
The fourth proportional to 289.41, 434.05 and 83.99 is: 125.97
Step by Step Solution
- Step 1: Write the proportion equation
289.41 : 434.05 = 83.99 : x - Step 2: Convert to fraction form
289.41/434.05 = 83.99/x - Step 3: Cross multiply
289.41x = 434.05 × 83.99 - Step 4: Simplify right side
289.41x = 36,455.86 - Step 5: Solve for x
x = 36,455.86/289.41 - Step 6: Final answer
x = 125.97
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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.