Finding the Fourth Proportional to 1,419.05, 2,128.52 and 393.05
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Solution
The fourth proportional to 1,419.05, 2,128.52 and 393.05 is: 589.56
Step by Step Solution
- Step 1: Write the proportion equation
1,419.05 : 2,128.52 = 393.05 : x - Step 2: Convert to fraction form
1,419.05/2,128.52 = 393.05/x - Step 3: Cross multiply
1,419.05x = 2,128.52 × 393.05 - Step 4: Simplify right side
1,419.05x = 836,605.13 - Step 5: Solve for x
x = 836,605.13/1,419.05 - Step 6: Final answer
x = 589.56
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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.