Finding the Fourth Proportional to 2,289.78, 3,432.63 and 990.81
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Solution
The fourth proportional to 2,289.78, 3,432.63 and 990.81 is: 1,485.33
Step by Step Solution
- Step 1: Write the proportion equation
2,289.78 : 3,432.63 = 990.81 : x - Step 2: Convert to fraction form
2,289.78/3,432.63 = 990.81/x - Step 3: Cross multiply
2,289.78x = 3,432.63 × 990.81 - Step 4: Simplify right side
2,289.78x = 3,401,084.13 - Step 5: Solve for x
x = 3,401,084.13/2,289.78 - Step 6: Final answer
x = 1,485.33
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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.