Finding the Fourth Proportional to 309.37, 426.99 and 198.99
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Solution
The fourth proportional to 309.37, 426.99 and 198.99 is: 274.64
Step by Step Solution
- Step 1: Write the proportion equation
309.37 : 426.99 = 198.99 : x - Step 2: Convert to fraction form
309.37/426.99 = 198.99/x - Step 3: Cross multiply
309.37x = 426.99 × 198.99 - Step 4: Simplify right side
309.37x = 84,966.74 - Step 5: Solve for x
x = 84,966.74/309.37 - Step 6: Final answer
x = 274.64
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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.