Finding the Fourth Proportional to 1,125,780,451.70, 1,688,882,813.30 and 426,482,040.38
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Solution
The fourth proportional to 1,125,780,451.70, 1,688,882,813.30 and 426,482,040.38 is: 639,803,424.45
Step by Step Solution
- Step 1: Write the proportion equation
1,125,780,451.70 : 1,688,882,813.30 = 426,482,040.38 : x - Step 2: Convert to fraction form
1,125,780,451.70/1,688,882,813.30 = 426,482,040.38/x - Step 3: Cross multiply
1,125,780,451.70x = 1,688,882,813.30 × 426,482,040.38 - Step 4: Simplify right side
1,125,780,451.70x = 720,278,188,171,520,384 - Step 5: Solve for x
x = 720,278,188,171,520,384/1,125,780,451.70 - Step 6: Final answer
x = 639,803,424.45
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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.