Finding the Fourth Proportional to 351.78, 485.42 and 202.44
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Solution
The fourth proportional to 351.78, 485.42 and 202.44 is: 279.35
Step by Step Solution
- Step 1: Write the proportion equation
351.78 : 485.42 = 202.44 : x - Step 2: Convert to fraction form
351.78/485.42 = 202.44/x - Step 3: Cross multiply
351.78x = 485.42 × 202.44 - Step 4: Simplify right side
351.78x = 98,269.23 - Step 5: Solve for x
x = 98,269.23/351.78 - Step 6: Final answer
x = 279.35
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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.