Finding the Fourth Proportional to 409.79, 614.66 and 135.81
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Solution
The fourth proportional to 409.79, 614.66 and 135.81 is: 203.70
Step by Step Solution
- Step 1: Write the proportion equation
409.79 : 614.66 = 135.81 : x - Step 2: Convert to fraction form
409.79/614.66 = 135.81/x - Step 3: Cross multiply
409.79x = 614.66 × 135.81 - Step 4: Simplify right side
409.79x = 83,476.30 - Step 5: Solve for x
x = 83,476.30/409.79 - Step 6: Final answer
x = 203.70
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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.