Finding the Fourth Proportional to 1,291.38, 1,937.12 and 743.31
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Solution
The fourth proportional to 1,291.38, 1,937.12 and 743.31 is: 1,114.99
Step by Step Solution
- Step 1: Write the proportion equation
1,291.38 : 1,937.12 = 743.31 : x - Step 2: Convert to fraction form
1,291.38/1,937.12 = 743.31/x - Step 3: Cross multiply
1,291.38x = 1,937.12 × 743.31 - Step 4: Simplify right side
1,291.38x = 1,439,880.67 - Step 5: Solve for x
x = 1,439,880.67/1,291.38 - Step 6: Final answer
x = 1,114.99
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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.