Finding the Fourth Proportional to 2,165,756.13, 2,987,435.93 and 1,391,126.20
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Solution
The fourth proportional to 2,165,756.13, 2,987,435.93 and 1,391,126.20 is: 1,918,914.29
Step by Step Solution
- Step 1: Write the proportion equation
2,165,756.13 : 2,987,435.93 = 1,391,126.20 : x - Step 2: Convert to fraction form
2,165,756.13/2,987,435.93 = 1,391,126.20/x - Step 3: Cross multiply
2,165,756.13x = 2,987,435.93 × 1,391,126.20 - Step 4: Simplify right side
2,165,756.13x = 4,155,900,378,620.15 - Step 5: Solve for x
x = 4,155,900,378,620.15/2,165,756.13 - Step 6: Final answer
x = 1,918,914.29
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1.5x scale
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.