Finding the Fourth Proportional to 202.19, 302.68 and 129.90
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Solution
The fourth proportional to 202.19, 302.68 and 129.90 is: 194.46
Step by Step Solution
- Step 1: Write the proportion equation
202.19 : 302.68 = 129.90 : x - Step 2: Convert to fraction form
202.19/302.68 = 129.90/x - Step 3: Cross multiply
202.19x = 302.68 × 129.90 - Step 4: Simplify right side
202.19x = 39,317.48 - Step 5: Solve for x
x = 39,317.48/202.19 - Step 6: Final answer
x = 194.46
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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.