Finding the Fourth Proportional to 202.79, 279.68 and 129.13
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Solution
The fourth proportional to 202.79, 279.68 and 129.13 is: 178.08
Step by Step Solution
- Step 1: Write the proportion equation
202.79 : 279.68 = 129.13 : x - Step 2: Convert to fraction form
202.79/279.68 = 129.13/x - Step 3: Cross multiply
202.79x = 279.68 × 129.13 - Step 4: Simplify right side
202.79x = 36,113.73 - Step 5: Solve for x
x = 36,113.73/202.79 - Step 6: Final answer
x = 178.08
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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.