Finding the Fourth Proportional to 2,115,079.09, 2,918,501.17 and 1,209,486.13
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Solution
The fourth proportional to 2,115,079.09, 2,918,501.17 and 1,209,486.13 is: 1,668,914.74
Step by Step Solution
- Step 1: Write the proportion equation
2,115,079.09 : 2,918,501.17 = 1,209,486.13 : x - Step 2: Convert to fraction form
2,115,079.09/2,918,501.17 = 1,209,486.13/x - Step 3: Cross multiply
2,115,079.09x = 2,918,501.17 × 1,209,486.13 - Step 4: Simplify right side
2,115,079.09x = 3,529,886,675,183.80 - Step 5: Solve for x
x = 3,529,886,675,183.80/2,115,079.09 - Step 6: Final answer
x = 1,668,914.74
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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.