Finding the Fourth Proportional to 1,378,539.90, 2,067,810.58 and 431,984.70
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Solution
The fourth proportional to 1,378,539.90, 2,067,810.58 and 431,984.70 is: 647,977.28
Step by Step Solution
- Step 1: Write the proportion equation
1,378,539.90 : 2,067,810.58 = 431,984.70 : x - Step 2: Convert to fraction form
1,378,539.90/2,067,810.58 = 431,984.70/x - Step 3: Cross multiply
1,378,539.90x = 2,067,810.58 × 431,984.70 - Step 4: Simplify right side
1,378,539.90x = 893,262,533,058.13 - Step 5: Solve for x
x = 893,262,533,058.13/1,378,539.90 - Step 6: Final answer
x = 647,977.28
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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.