Finding the Fourth Proportional to 1,912,515.31, 2,639,329.20 and 1,053,106.32
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Solution
The fourth proportional to 1,912,515.31, 2,639,329.20 and 1,053,106.32 is: 1,453,318.70
Step by Step Solution
- Step 1: Write the proportion equation
1,912,515.31 : 2,639,329.20 = 1,053,106.32 : x - Step 2: Convert to fraction form
1,912,515.31/2,639,329.20 = 1,053,106.32/x - Step 3: Cross multiply
1,912,515.31x = 2,639,329.20 × 1,053,106.32 - Step 4: Simplify right side
1,912,515.31x = 2,779,494,270,978.03 - Step 5: Solve for x
x = 2,779,494,270,978.03/1,912,515.31 - Step 6: Final answer
x = 1,453,318.70
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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.