Finding the Fourth Proportional to 45.81, 68.71 and 28.68
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Solution
The fourth proportional to 45.81, 68.71 and 28.68 is: 43.02
Step by Step Solution
- Step 1: Write the proportion equation
45.81 : 68.71 = 28.68 : x - Step 2: Convert to fraction form
45.81/68.71 = 28.68/x - Step 3: Cross multiply
45.81x = 68.71 × 28.68 - Step 4: Simplify right side
45.81x = 1,970.60 - Step 5: Solve for x
x = 1,970.60/45.81 - Step 6: Final answer
x = 43.02
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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.