Finding the Fourth Proportional to 209.99, 314.87 and 72.99
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Solution
The fourth proportional to 209.99, 314.87 and 72.99 is: 109.45
Step by Step Solution
- Step 1: Write the proportion equation
209.99 : 314.87 = 72.99 : x - Step 2: Convert to fraction form
209.99/314.87 = 72.99/x - Step 3: Cross multiply
209.99x = 314.87 × 72.99 - Step 4: Simplify right side
209.99x = 22,982.00 - Step 5: Solve for x
x = 22,982.00/209.99 - Step 6: Final answer
x = 109.45
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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.