Finding the Fourth Proportional to 289.36, 434.05 and 69.99
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Solution
The fourth proportional to 289.36, 434.05 and 69.99 is: 104.98
Step by Step Solution
- Step 1: Write the proportion equation
289.36 : 434.05 = 69.99 : x - Step 2: Convert to fraction form
289.36/434.05 = 69.99/x - Step 3: Cross multiply
289.36x = 434.05 × 69.99 - Step 4: Simplify right side
289.36x = 30,377.86 - Step 5: Solve for x
x = 30,377.86/289.36 - Step 6: Final answer
x = 104.98
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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.