Finding the Fourth Proportional to 1,085.13, 1,628.28 and 720.09
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Solution
The fourth proportional to 1,085.13, 1,628.28 and 720.09 is: 1,080.52
Step by Step Solution
- Step 1: Write the proportion equation
1,085.13 : 1,628.28 = 720.09 : x - Step 2: Convert to fraction form
1,085.13/1,628.28 = 720.09/x - Step 3: Cross multiply
1,085.13x = 1,628.28 × 720.09 - Step 4: Simplify right side
1,085.13x = 1,172,508.15 - Step 5: Solve for x
x = 1,172,508.15/1,085.13 - Step 6: Final answer
x = 1,080.52
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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.