Finding the Fourth Proportional to 209.86, 289.58 and 126.99
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Solution
The fourth proportional to 209.86, 289.58 and 126.99 is: 175.23
Step by Step Solution
- Step 1: Write the proportion equation
209.86 : 289.58 = 126.99 : x - Step 2: Convert to fraction form
209.86/289.58 = 126.99/x - Step 3: Cross multiply
209.86x = 289.58 × 126.99 - Step 4: Simplify right side
209.86x = 36,773.36 - Step 5: Solve for x
x = 36,773.36/209.86 - Step 6: Final answer
x = 175.23
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.