Finding the Fourth Proportional to 1,420, 2,129.20 and 650.08
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Solution
The fourth proportional to 1,420, 2,129.20 and 650.08 is: 974.75
Step by Step Solution
- Step 1: Write the proportion equation
1,420 : 2,129.20 = 650.08 : x - Step 2: Convert to fraction form
1,420/2,129.20 = 650.08/x - Step 3: Cross multiply
1,420x = 2,129.20 × 650.08 - Step 4: Simplify right side
1,420x = 1,384,150.34 - Step 5: Solve for x
x = 1,384,150.34/1,420 - Step 6: Final answer
x = 974.75
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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.