Finding the Fourth Proportional to 421.23, 630.63 and 283.80
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Solution
The fourth proportional to 421.23, 630.63 and 283.80 is: 424.88
Step by Step Solution
- Step 1: Write the proportion equation
421.23 : 630.63 = 283.80 : x - Step 2: Convert to fraction form
421.23/630.63 = 283.80/x - Step 3: Cross multiply
421.23x = 630.63 × 283.80 - Step 4: Simplify right side
421.23x = 178,972.79 - Step 5: Solve for x
x = 178,972.79/421.23 - Step 6: Final answer
x = 424.88
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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.