Finding the Fourth Proportional to 289.99, 434.74 and 135.84
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Solution
The fourth proportional to 289.99, 434.74 and 135.84 is: 203.65
Step by Step Solution
- Step 1: Write the proportion equation
289.99 : 434.74 = 135.84 : x - Step 2: Convert to fraction form
289.99/434.74 = 135.84/x - Step 3: Cross multiply
289.99x = 434.74 × 135.84 - Step 4: Simplify right side
289.99x = 59,055.08 - Step 5: Solve for x
x = 59,055.08/289.99 - Step 6: Final answer
x = 203.65
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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.