Finding the Fourth Proportional to 354.92, 489.78 and 214.99
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Solution
The fourth proportional to 354.92, 489.78 and 214.99 is: 296.68
Step by Step Solution
- Step 1: Write the proportion equation
354.92 : 489.78 = 214.99 : x - Step 2: Convert to fraction form
354.92/489.78 = 214.99/x - Step 3: Cross multiply
354.92x = 489.78 × 214.99 - Step 4: Simplify right side
354.92x = 105,296.58 - Step 5: Solve for x
x = 105,296.58/354.92 - Step 6: Final answer
x = 296.68
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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.