Finding the Fourth Proportional to 1,278.99, 1,764.99 and 719.44
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Solution
The fourth proportional to 1,278.99, 1,764.99 and 719.44 is: 992.81
Step by Step Solution
- Step 1: Write the proportion equation
1,278.99 : 1,764.99 = 719.44 : x - Step 2: Convert to fraction form
1,278.99/1,764.99 = 719.44/x - Step 3: Cross multiply
1,278.99x = 1,764.99 × 719.44 - Step 4: Simplify right side
1,278.99x = 1,269,799.99 - Step 5: Solve for x
x = 1,269,799.99/1,278.99 - Step 6: Final answer
x = 992.81
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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.