Finding the Fourth Proportional to 940, 1,297.20 and 572
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Solution
The fourth proportional to 940, 1,297.20 and 572 is: 789.36
Step by Step Solution
- Step 1: Write the proportion equation
940 : 1,297.20 = 572 : x - Step 2: Convert to fraction form
940/1,297.20 = 572/x - Step 3: Cross multiply
940x = 1,297.20 × 572 - Step 4: Simplify right side
940x = 741,998.40 - Step 5: Solve for x
x = 741,998.40/940 - Step 6: Final answer
x = 789.36
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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.