Finding the Fourth Proportional to 409.80, 614.70 and 135.80
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Solution
The fourth proportional to 409.80, 614.70 and 135.80 is: 203.70
Step by Step Solution
- Step 1: Write the proportion equation
409.80 : 614.70 = 135.80 : x - Step 2: Convert to fraction form
409.80/614.70 = 135.80/x - Step 3: Cross multiply
409.80x = 614.70 × 135.80 - Step 4: Simplify right side
409.80x = 83,476.26 - Step 5: Solve for x
x = 83,476.26/409.80 - 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.