Finding the Fourth Proportional to 2,178,252,389.70, 3,267,378,584.55 and 542,476,991.70
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Solution
The fourth proportional to 2,178,252,389.70, 3,267,378,584.55 and 542,476,991.70 is: 813,715,487.55
Step by Step Solution
- Step 1: Write the proportion equation
2,178,252,389.70 : 3,267,378,584.55 = 542,476,991.70 : x - Step 2: Convert to fraction form
2,178,252,389.70/3,267,378,584.55 = 542,476,991.70/x - Step 3: Cross multiply
2,178,252,389.70x = 3,267,378,584.55 × 542,476,991.70 - Step 4: Simplify right side
2,178,252,389.70x = 1,772,477,705,291,688,448 - Step 5: Solve for x
x = 1,772,477,705,291,688,448/2,178,252,389.70 - Step 6: Final answer
x = 813,715,487.55
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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.