Finding the Fourth Proportional to 39.71, 54.70 and 30.49
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Solution
The fourth proportional to 39.71, 54.70 and 30.49 is: 41.99
Step by Step Solution
- Step 1: Write the proportion equation
39.71 : 54.70 = 30.49 : x - Step 2: Convert to fraction form
39.71/54.70 = 30.49/x - Step 3: Cross multiply
39.71x = 54.70 × 30.49 - Step 4: Simplify right side
39.71x = 1,667.59 - Step 5: Solve for x
x = 1,667.59/39.71 - Step 6: Final answer
x = 41.99
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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.