Finding the Fourth Proportional to 1,260,784,238.80, 1,891,176,358.20 and 442,896,539.80
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Solution
The fourth proportional to 1,260,784,238.80, 1,891,176,358.20 and 442,896,539.80 is: 664,344,809.70
Step by Step Solution
- Step 1: Write the proportion equation
1,260,784,238.80 : 1,891,176,358.20 = 442,896,539.80 : x - Step 2: Convert to fraction form
1,260,784,238.80/1,891,176,358.20 = 442,896,539.80/x - Step 3: Cross multiply
1,260,784,238.80x = 1,891,176,358.20 × 442,896,539.80 - Step 4: Simplify right side
1,260,784,238.80x = 837,595,465,198,345,344 - Step 5: Solve for x
x = 837,595,465,198,345,344/1,260,784,238.80 - Step 6: Final answer
x = 664,344,809.70
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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.