Finding the Fourth Proportional to 1,121,643,349.56, 1,680,961,091.47 and 872,948,890.60
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Solution
The fourth proportional to 1,121,643,349.56, 1,680,961,091.47 and 872,948,890.60 is: 1,308,252,859.98
Step by Step Solution
- Step 1: Write the proportion equation
1,121,643,349.56 : 1,680,961,091.47 = 872,948,890.60 : x - Step 2: Convert to fraction form
1,121,643,349.56/1,680,961,091.47 = 872,948,890.60/x - Step 3: Cross multiply
1,121,643,349.56x = 1,680,961,091.47 × 872,948,890.60 - Step 4: Simplify right side
1,121,643,349.56x = 1,467,393,119,934,063,104 - Step 5: Solve for x
x = 1,467,393,119,934,063,104/1,121,643,349.56 - Step 6: Final answer
x = 1,308,252,859.98
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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.