Finding the Fourth Proportional to 4.20, 6 and 4.20
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Solution
The fourth proportional to 4.20, 6 and 4.20 is: 6
Step by Step Solution
- Step 1: Write the proportion equation
4.20 : 6 = 4.20 : x - Step 2: Convert to fraction form
4.20/6 = 4.20/x - Step 3: Cross multiply
4.20x = 6 × 4.20 - Step 4: Simplify right side
4.20x = 25.20 - Step 5: Solve for x
x = 25.20/4.20 - Step 6: Final answer
x = 6
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Why These Related Problems?
These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.