Finding the Fourth Proportional to 1,198,334,212.80, 1,793,520,007.20 and 869,875,972.80
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Solution
The fourth proportional to 1,198,334,212.80, 1,793,520,007.20 and 869,875,972.80 is: 1,301,923,907.65
Step by Step Solution
- Step 1: Write the proportion equation
1,198,334,212.80 : 1,793,520,007.20 = 869,875,972.80 : x - Step 2: Convert to fraction form
1,198,334,212.80/1,793,520,007.20 = 869,875,972.80/x - Step 3: Cross multiply
1,198,334,212.80x = 1,793,520,007.20 × 869,875,972.80 - Step 4: Simplify right side
1,198,334,212.80x = 1,560,139,960,999,363,072 - Step 5: Solve for x
x = 1,560,139,960,999,363,072/1,198,334,212.80 - Step 6: Final answer
x = 1,301,923,907.65
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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.