Finding the Fourth Proportional to 420.20, 579.84 and 233.68
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Solution
The fourth proportional to 420.20, 579.84 and 233.68 is: 322.46
Step by Step Solution
- Step 1: Write the proportion equation
420.20 : 579.84 = 233.68 : x - Step 2: Convert to fraction form
420.20/579.84 = 233.68/x - Step 3: Cross multiply
420.20x = 579.84 × 233.68 - Step 4: Simplify right side
420.20x = 135,497.01 - Step 5: Solve for x
x = 135,497.01/420.20 - Step 6: Final answer
x = 322.46
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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.