Finding the Fourth Proportional to 260.84, 391.03 and 138.99
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Solution
The fourth proportional to 260.84, 391.03 and 138.99 is: 208.36
Step by Step Solution
- Step 1: Write the proportion equation
260.84 : 391.03 = 138.99 : x - Step 2: Convert to fraction form
260.84/391.03 = 138.99/x - Step 3: Cross multiply
260.84x = 391.03 × 138.99 - Step 4: Simplify right side
260.84x = 54,347.97 - Step 5: Solve for x
x = 54,347.97/260.84 - Step 6: Final answer
x = 208.36
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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.