Finding the Fourth Proportional to 2,108.99, 3,163.30 and 648
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Solution
The fourth proportional to 2,108.99, 3,163.30 and 648 is: 971.95
Step by Step Solution
- Step 1: Write the proportion equation
2,108.99 : 3,163.30 = 648 : x - Step 2: Convert to fraction form
2,108.99/3,163.30 = 648/x - Step 3: Cross multiply
2,108.99x = 3,163.30 × 648 - Step 4: Simplify right side
2,108.99x = 2,049,820.43 - Step 5: Solve for x
x = 2,049,820.43/2,108.99 - Step 6: Final answer
x = 971.95
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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.