Finding the Fourth Proportional to 1,912,971.40, 2,639,868.36 and 1,053,611.68
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Solution
The fourth proportional to 1,912,971.40, 2,639,868.36 and 1,053,611.68 is: 1,453,966.40
Step by Step Solution
- Step 1: Write the proportion equation
1,912,971.40 : 2,639,868.36 = 1,053,611.68 : x - Step 2: Convert to fraction form
1,912,971.40/2,639,868.36 = 1,053,611.68/x - Step 3: Cross multiply
1,912,971.40x = 2,639,868.36 × 1,053,611.68 - Step 4: Simplify right side
1,912,971.40x = 2,781,396,137,758.44 - Step 5: Solve for x
x = 2,781,396,137,758.44/1,912,971.40 - Step 6: Final answer
x = 1,453,966.40
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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.