Finding the Fourth Proportional to 1,245,620,402.80, 1,868,430,604.20 and 727,784,292.40
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Solution
The fourth proportional to 1,245,620,402.80, 1,868,430,604.20 and 727,784,292.40 is: 1,091,676,438.60
Step by Step Solution
- Step 1: Write the proportion equation
1,245,620,402.80 : 1,868,430,604.20 = 727,784,292.40 : x - Step 2: Convert to fraction form
1,245,620,402.80/1,868,430,604.20 = 727,784,292.40/x - Step 3: Cross multiply
1,245,620,402.80x = 1,868,430,604.20 × 727,784,292.40 - Step 4: Simplify right side
1,245,620,402.80x = 1,359,814,445,176,201,472 - Step 5: Solve for x
x = 1,359,814,445,176,201,472/1,245,620,402.80 - Step 6: Final answer
x = 1,091,676,438.60
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1.5x scale
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.