Finding the Fourth Proportional to 1,225,840,910.40, 1,691,696,346.48 and 668,959,851.60
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Solution
The fourth proportional to 1,225,840,910.40, 1,691,696,346.48 and 668,959,851.60 is: 923,184,180.99
Step by Step Solution
- Step 1: Write the proportion equation
1,225,840,910.40 : 1,691,696,346.48 = 668,959,851.60 : x - Step 2: Convert to fraction form
1,225,840,910.40/1,691,696,346.48 = 668,959,851.60/x - Step 3: Cross multiply
1,225,840,910.40x = 1,691,696,346.48 × 668,959,851.60 - Step 4: Simplify right side
1,225,840,910.40x = 1,131,676,936,893,523,072 - Step 5: Solve for x
x = 1,131,676,936,893,523,072/1,225,840,910.40 - Step 6: Final answer
x = 923,184,180.99
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1.5x scale
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.