Finding the Fourth Proportional to 1,424.16, 2,135.70 and 558
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Solution
The fourth proportional to 1,424.16, 2,135.70 and 558 is: 836.79
Step by Step Solution
- Step 1: Write the proportion equation
1,424.16 : 2,135.70 = 558 : x - Step 2: Convert to fraction form
1,424.16/2,135.70 = 558/x - Step 3: Cross multiply
1,424.16x = 2,135.70 × 558 - Step 4: Simplify right side
1,424.16x = 1,191,720.60 - Step 5: Solve for x
x = 1,191,720.60/1,424.16 - Step 6: Final answer
x = 836.79
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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.