Finding the Fourth Proportional to 7.61, 10.50 and 5.79
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Solution
The fourth proportional to 7.61, 10.50 and 5.79 is: 7.99
Step by Step Solution
- Step 1: Write the proportion equation
7.61 : 10.50 = 5.79 : x - Step 2: Convert to fraction form
7.61/10.50 = 5.79/x - Step 3: Cross multiply
7.61x = 10.50 × 5.79 - Step 4: Simplify right side
7.61x = 60.80 - Step 5: Solve for x
x = 60.80/7.61 - Step 6: Final answer
x = 7.99
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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.