Finding the Fourth Proportional to 40.42, 55.77 and 21.99
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Solution
The fourth proportional to 40.42, 55.77 and 21.99 is: 30.35
Step by Step Solution
- Step 1: Write the proportion equation
40.42 : 55.77 = 21.99 : x - Step 2: Convert to fraction form
40.42/55.77 = 21.99/x - Step 3: Cross multiply
40.42x = 55.77 × 21.99 - Step 4: Simplify right side
40.42x = 1,226.73 - Step 5: Solve for x
x = 1,226.73/40.42 - Step 6: Final answer
x = 30.35
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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.