Finding the Fourth Proportional to 291.42, 402.21 and 180.99
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Solution
The fourth proportional to 291.42, 402.21 and 180.99 is: 249.80
Step by Step Solution
- Step 1: Write the proportion equation
291.42 : 402.21 = 180.99 : x - Step 2: Convert to fraction form
291.42/402.21 = 180.99/x - Step 3: Cross multiply
291.42x = 402.21 × 180.99 - Step 4: Simplify right side
291.42x = 72,795.99 - Step 5: Solve for x
x = 72,795.99/291.42 - Step 6: Final answer
x = 249.80
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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.