Finding the Fourth Proportional to 1,224.05, 1,836.59 and 639.49
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Solution
The fourth proportional to 1,224.05, 1,836.59 and 639.49 is: 959.50
Step by Step Solution
- Step 1: Write the proportion equation
1,224.05 : 1,836.59 = 639.49 : x - Step 2: Convert to fraction form
1,224.05/1,836.59 = 639.49/x - Step 3: Cross multiply
1,224.05x = 1,836.59 × 639.49 - Step 4: Simplify right side
1,224.05x = 1,174,471.76 - Step 5: Solve for x
x = 1,174,471.76/1,224.05 - Step 6: Final answer
x = 959.50
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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.