Finding the Fourth Proportional to 355.19, 490.05 and 207.77
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Solution
The fourth proportional to 355.19, 490.05 and 207.77 is: 286.65
Step by Step Solution
- Step 1: Write the proportion equation
355.19 : 490.05 = 207.77 : x - Step 2: Convert to fraction form
355.19/490.05 = 207.77/x - Step 3: Cross multiply
355.19x = 490.05 × 207.77 - Step 4: Simplify right side
355.19x = 101,815.24 - Step 5: Solve for x
x = 101,815.24/355.19 - Step 6: Final answer
x = 286.65
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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.