Finding the Fourth Proportional to 356.77, 492.17 and 209.31
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Solution
The fourth proportional to 356.77, 492.17 and 209.31 is: 288.75
Step by Step Solution
- Step 1: Write the proportion equation
356.77 : 492.17 = 209.31 : x - Step 2: Convert to fraction form
356.77/492.17 = 209.31/x - Step 3: Cross multiply
356.77x = 492.17 × 209.31 - Step 4: Simplify right side
356.77x = 103,016.10 - Step 5: Solve for x
x = 103,016.10/356.77 - Step 6: Final answer
x = 288.75
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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.