Finding the Fourth Proportional to 3,928,618.40, 5,421,438.96 and 2,209,740.08
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Solution
The fourth proportional to 3,928,618.40, 5,421,438.96 and 2,209,740.08 is: 3,049,410.69
Step by Step Solution
- Step 1: Write the proportion equation
3,928,618.40 : 5,421,438.96 = 2,209,740.08 : x - Step 2: Convert to fraction form
3,928,618.40/5,421,438.96 = 2,209,740.08/x - Step 3: Cross multiply
3,928,618.40x = 5,421,438.96 × 2,209,740.08 - Step 4: Simplify right side
3,928,618.40x = 11,979,970,961,185.52 - Step 5: Solve for x
x = 11,979,970,961,185.52/3,928,618.40 - Step 6: Final answer
x = 3,049,410.69
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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.