Finding the Fourth Proportional to 839,810,138.20, 1,259,715,207.30 and 379,763,315.80
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Solution
The fourth proportional to 839,810,138.20, 1,259,715,207.30 and 379,763,315.80 is: 569,644,973.70
Step by Step Solution
- Step 1: Write the proportion equation
839,810,138.20 : 1,259,715,207.30 = 379,763,315.80 : x - Step 2: Convert to fraction form
839,810,138.20/1,259,715,207.30 = 379,763,315.80/x - Step 3: Cross multiply
839,810,138.20x = 1,259,715,207.30 × 379,763,315.80 - Step 4: Simplify right side
839,810,138.20x = 478,393,624,087,932,352 - Step 5: Solve for x
x = 478,393,624,087,932,352/839,810,138.20 - Step 6: Final answer
x = 569,644,973.70
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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.