Finding the Fourth Proportional to 420.23, 630.66 and 214.97
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Solution
The fourth proportional to 420.23, 630.66 and 214.97 is: 322.62
Step by Step Solution
- Step 1: Write the proportion equation
420.23 : 630.66 = 214.97 : x - Step 2: Convert to fraction form
420.23/630.66 = 214.97/x - Step 3: Cross multiply
420.23x = 630.66 × 214.97 - Step 4: Simplify right side
420.23x = 135,575.36 - Step 5: Solve for x
x = 135,575.36/420.23 - Step 6: Final answer
x = 322.62
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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.