Finding the Fourth Proportional to 1,145.05, 1,580.16 and 621.08
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Solution
The fourth proportional to 1,145.05, 1,580.16 and 621.08 is: 857.09
Step by Step Solution
- Step 1: Write the proportion equation
1,145.05 : 1,580.16 = 621.08 : x - Step 2: Convert to fraction form
1,145.05/1,580.16 = 621.08/x - Step 3: Cross multiply
1,145.05x = 1,580.16 × 621.08 - Step 4: Simplify right side
1,145.05x = 981,406.13 - Step 5: Solve for x
x = 981,406.13/1,145.05 - Step 6: Final answer
x = 857.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.