Finding the Fourth Proportional to 879.05, 1,213.08 and 486
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Solution
The fourth proportional to 879.05, 1,213.08 and 486 is: 670.67
Step by Step Solution
- Step 1: Write the proportion equation
879.05 : 1,213.08 = 486 : x - Step 2: Convert to fraction form
879.05/1,213.08 = 486/x - Step 3: Cross multiply
879.05x = 1,213.08 × 486 - Step 4: Simplify right side
879.05x = 589,555.06 - Step 5: Solve for x
x = 589,555.06/879.05 - Step 6: Final answer
x = 670.67
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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.