Finding the Fourth Proportional to 402.78, 555.65 and 236.99
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Solution
The fourth proportional to 402.78, 555.65 and 236.99 is: 326.94
Step by Step Solution
- Step 1: Write the proportion equation
402.78 : 555.65 = 236.99 : x - Step 2: Convert to fraction form
402.78/555.65 = 236.99/x - Step 3: Cross multiply
402.78x = 555.65 × 236.99 - Step 4: Simplify right side
402.78x = 131,683.49 - Step 5: Solve for x
x = 131,683.49/402.78 - Step 6: Final answer
x = 326.94
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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.