Finding the Fourth Proportional to 397,423,769.10, 548,444,826.63 and 221,207,971.02
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Solution
The fourth proportional to 397,423,769.10, 548,444,826.63 and 221,207,971.02 is: 305,267,014.07
Step by Step Solution
- Step 1: Write the proportion equation
397,423,769.10 : 548,444,826.63 = 221,207,971.02 : x - Step 2: Convert to fraction form
397,423,769.10/548,444,826.63 = 221,207,971.02/x - Step 3: Cross multiply
397,423,769.10x = 548,444,826.63 × 221,207,971.02 - Step 4: Simplify right side
397,423,769.10x = 121,320,367,315,237,968 - Step 5: Solve for x
x = 121,320,367,315,237,968/397,423,769.10 - Step 6: Final answer
x = 305,267,014.07
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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.