Finding the Fourth Proportional to 420.99, 580.94 and 234.48
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Solution
The fourth proportional to 420.99, 580.94 and 234.48 is: 323.57
Step by Step Solution
- Step 1: Write the proportion equation
420.99 : 580.94 = 234.48 : x - Step 2: Convert to fraction form
420.99/580.94 = 234.48/x - Step 3: Cross multiply
420.99x = 580.94 × 234.48 - Step 4: Simplify right side
420.99x = 136,218.81 - Step 5: Solve for x
x = 136,218.81/420.99 - Step 6: Final answer
x = 323.57
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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.