Finding the Fourth Proportional to 51.29, 70.79 and 31.88
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Solution
The fourth proportional to 51.29, 70.79 and 31.88 is: 43.99
Step by Step Solution
- Step 1: Write the proportion equation
51.29 : 70.79 = 31.88 : x - Step 2: Convert to fraction form
51.29/70.79 = 31.88/x - Step 3: Cross multiply
51.29x = 70.79 × 31.88 - Step 4: Simplify right side
51.29x = 2,256.27 - Step 5: Solve for x
x = 2,256.27/51.29 - Step 6: Final answer
x = 43.99
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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.