Finding the Fourth Proportional to 1,390,989.40, 2,085,965.70 and 492,083.80
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Solution
The fourth proportional to 1,390,989.40, 2,085,965.70 and 492,083.80 is: 737,942.31
Step by Step Solution
- Step 1: Write the proportion equation
1,390,989.40 : 2,085,965.70 = 492,083.80 : x - Step 2: Convert to fraction form
1,390,989.40/2,085,965.70 = 492,083.80/x - Step 3: Cross multiply
1,390,989.40x = 2,085,965.70 × 492,083.80 - Step 4: Simplify right side
1,390,989.40x = 1,026,469,928,325.66 - Step 5: Solve for x
x = 1,026,469,928,325.66/1,390,989.40 - Step 6: Final answer
x = 737,942.31
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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.