Finding the Fourth Proportional to 1,278,509.42, 1,915,438.34 and 744,411.26
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Solution
The fourth proportional to 1,278,509.42, 1,915,438.34 and 744,411.26 is: 1,115,262.70
Step by Step Solution
- Step 1: Write the proportion equation
1,278,509.42 : 1,915,438.34 = 744,411.26 : x - Step 2: Convert to fraction form
1,278,509.42/1,915,438.34 = 744,411.26/x - Step 3: Cross multiply
1,278,509.42x = 1,915,438.34 × 744,411.26 - Step 4: Simplify right side
1,278,509.42x = 1,425,873,868,131.71 - Step 5: Solve for x
x = 1,425,873,868,131.71/1,278,509.42 - Step 6: Final answer
x = 1,115,262.70
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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.