Finding the Fourth Proportional to 40.99, 56.58 and 31.79
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Solution
The fourth proportional to 40.99, 56.58 and 31.79 is: 43.88
Step by Step Solution
- Step 1: Write the proportion equation
40.99 : 56.58 = 31.79 : x - Step 2: Convert to fraction form
40.99/56.58 = 31.79/x - Step 3: Cross multiply
40.99x = 56.58 × 31.79 - Step 4: Simplify right side
40.99x = 1,798.68 - Step 5: Solve for x
x = 1,798.68/40.99 - Step 6: Final answer
x = 43.88
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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.