Finding the Fourth Proportional to 1,555,015,220, 2,145,965,793.36 and 859,698,985.76
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Solution
The fourth proportional to 1,555,015,220, 2,145,965,793.36 and 859,698,985.76 is: 1,186,409,362.62
Step by Step Solution
- Step 1: Write the proportion equation
1,555,015,220 : 2,145,965,793.36 = 859,698,985.76 : x - Step 2: Convert to fraction form
1,555,015,220/2,145,965,793.36 = 859,698,985.76/x - Step 3: Cross multiply
1,555,015,220x = 2,145,965,793.36 × 859,698,985.76 - Step 4: Simplify right side
1,555,015,220x = 1,844,884,616,027,245,568 - Step 5: Solve for x
x = 1,844,884,616,027,245,568/1,555,015,220 - Step 6: Final answer
x = 1,186,409,362.62
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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.