Finding the Fourth Proportional to 355.06, 489.99 and 217.06
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Solution
The fourth proportional to 355.06, 489.99 and 217.06 is: 299.55
Step by Step Solution
- Step 1: Write the proportion equation
355.06 : 489.99 = 217.06 : x - Step 2: Convert to fraction form
355.06/489.99 = 217.06/x - Step 3: Cross multiply
355.06x = 489.99 × 217.06 - Step 4: Simplify right side
355.06x = 106,357.23 - Step 5: Solve for x
x = 106,357.23/355.06 - Step 6: Final answer
x = 299.55
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.