Finding the Fourth Proportional to 4.79, 6.61 and 3.98
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Solution
The fourth proportional to 4.79, 6.61 and 3.98 is: 5.49
Step by Step Solution
- Step 1: Write the proportion equation
4.79 : 6.61 = 3.98 : x - Step 2: Convert to fraction form
4.79/6.61 = 3.98/x - Step 3: Cross multiply
4.79x = 6.61 × 3.98 - Step 4: Simplify right side
4.79x = 26.31 - Step 5: Solve for x
x = 26.31/4.79 - Step 6: Final answer
x = 5.49
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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.