Finding the Fourth Proportional to 5,430,939.28, 7,493,863.08 and 3,138,657.28
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Solution
The fourth proportional to 5,430,939.28, 7,493,863.08 and 3,138,657.28 is: 4,330,865.56
Step by Step Solution
- Step 1: Write the proportion equation
5,430,939.28 : 7,493,863.08 = 3,138,657.28 : x - Step 2: Convert to fraction form
5,430,939.28/7,493,863.08 = 3,138,657.28/x - Step 3: Cross multiply
5,430,939.28x = 7,493,863.08 × 3,138,657.28 - Step 4: Simplify right side
5,430,939.28x = 23,520,667,911,365.22 - Step 5: Solve for x
x = 23,520,667,911,365.22/5,430,939.28 - Step 6: Final answer
x = 4,330,865.56
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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.