Finding the Fourth Proportional to 5,478,485.76, 8,219,478.40 and 2,638,885.12
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Solution
The fourth proportional to 5,478,485.76, 8,219,478.40 and 2,638,885.12 is: 3,959,170.51
Step by Step Solution
- Step 1: Write the proportion equation
5,478,485.76 : 8,219,478.40 = 2,638,885.12 : x - Step 2: Convert to fraction form
5,478,485.76/8,219,478.40 = 2,638,885.12/x - Step 3: Cross multiply
5,478,485.76x = 8,219,478.40 × 2,638,885.12 - Step 4: Simplify right side
5,478,485.76x = 21,690,259,243,921.41 - Step 5: Solve for x
x = 21,690,259,243,921.41/5,478,485.76 - Step 6: Final answer
x = 3,959,170.51
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.