Finding the Fourth Proportional to 2,115,922.90, 2,920,867.38 and 1,428,525.78
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Solution
The fourth proportional to 2,115,922.90, 2,920,867.38 and 1,428,525.78 is: 1,971,968.99
Step by Step Solution
- Step 1: Write the proportion equation
2,115,922.90 : 2,920,867.38 = 1,428,525.78 : x - Step 2: Convert to fraction form
2,115,922.90/2,920,867.38 = 1,428,525.78/x - Step 3: Cross multiply
2,115,922.90x = 2,920,867.38 × 1,428,525.78 - Step 4: Simplify right side
2,115,922.90x = 4,172,534,345,148.43 - Step 5: Solve for x
x = 4,172,534,345,148.43/2,115,922.90 - Step 6: Final answer
x = 1,971,968.99
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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.