Finding the Fourth Proportional to 409.90, 614.79 and 135.99
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Solution
The fourth proportional to 409.90, 614.79 and 135.99 is: 203.97
Step by Step Solution
- Step 1: Write the proportion equation
409.90 : 614.79 = 135.99 : x - Step 2: Convert to fraction form
409.90/614.79 = 135.99/x - Step 3: Cross multiply
409.90x = 614.79 × 135.99 - Step 4: Simplify right side
409.90x = 83,605.29 - Step 5: Solve for x
x = 83,605.29/409.90 - Step 6: Final answer
x = 203.97
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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.