Finding the Fourth Proportional to 882.68, 1,218 and 489.68
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Solution
The fourth proportional to 882.68, 1,218 and 489.68 is: 675.70
Step by Step Solution
- Step 1: Write the proportion equation
882.68 : 1,218 = 489.68 : x - Step 2: Convert to fraction form
882.68/1,218 = 489.68/x - Step 3: Cross multiply
882.68x = 1,218 × 489.68 - Step 4: Simplify right side
882.68x = 596,430.24 - Step 5: Solve for x
x = 596,430.24/882.68 - Step 6: Final answer
x = 675.70
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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.