Finding the Fourth Proportional to 420.36, 580.18 and 254.68
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Solution
The fourth proportional to 420.36, 580.18 and 254.68 is: 351.51
Step by Step Solution
- Step 1: Write the proportion equation
420.36 : 580.18 = 254.68 : x - Step 2: Convert to fraction form
420.36/580.18 = 254.68/x - Step 3: Cross multiply
420.36x = 580.18 × 254.68 - Step 4: Simplify right side
420.36x = 147,760.24 - Step 5: Solve for x
x = 147,760.24/420.36 - Step 6: Final answer
x = 351.51
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.