Finding the Fourth Proportional to 3,928,581.81, 5,421,444.21 and 2,209,703.49
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Solution
The fourth proportional to 3,928,581.81, 5,421,444.21 and 2,209,703.49 is: 3,049,391.55
Step by Step Solution
- Step 1: Write the proportion equation
3,928,581.81 : 5,421,444.21 = 2,209,703.49 : x - Step 2: Convert to fraction form
3,928,581.81/5,421,444.21 = 2,209,703.49/x - Step 3: Cross multiply
3,928,581.81x = 5,421,444.21 × 2,209,703.49 - Step 4: Simplify right side
3,928,581.81x = 11,979,784,191,677.29 - Step 5: Solve for x
x = 11,979,784,191,677.29/3,928,581.81 - Step 6: Final answer
x = 3,049,391.55
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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.