Finding the Fourth Proportional to 663.18, 915.21 and 368.44
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Solution
The fourth proportional to 663.18, 915.21 and 368.44 is: 508.46
Step by Step Solution
- Step 1: Write the proportion equation
663.18 : 915.21 = 368.44 : x - Step 2: Convert to fraction form
663.18/915.21 = 368.44/x - Step 3: Cross multiply
663.18x = 915.21 × 368.44 - Step 4: Simplify right side
663.18x = 337,198.13 - Step 5: Solve for x
x = 337,198.13/663.18 - Step 6: Final answer
x = 508.46
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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.