Finding the Fourth Proportional to 1,247.56, 1,871.58 and 478
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Solution
The fourth proportional to 1,247.56, 1,871.58 and 478 is: 717.09
Step by Step Solution
- Step 1: Write the proportion equation
1,247.56 : 1,871.58 = 478 : x - Step 2: Convert to fraction form
1,247.56/1,871.58 = 478/x - Step 3: Cross multiply
1,247.56x = 1,871.58 × 478 - Step 4: Simplify right side
1,247.56x = 894,615.24 - Step 5: Solve for x
x = 894,615.24/1,247.56 - Step 6: Final answer
x = 717.09
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.