Finding the Fourth Proportional to 839,815,286.20, 1,259,722,929.30 and 768,389,615.80
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Solution
The fourth proportional to 839,815,286.20, 1,259,722,929.30 and 768,389,615.80 is: 1,152,584,423.70
Step by Step Solution
- Step 1: Write the proportion equation
839,815,286.20 : 1,259,722,929.30 = 768,389,615.80 : x - Step 2: Convert to fraction form
839,815,286.20/1,259,722,929.30 = 768,389,615.80/x - Step 3: Cross multiply
839,815,286.20x = 1,259,722,929.30 × 768,389,615.80 - Step 4: Simplify right side
839,815,286.20x = 967,958,017,659,277,440 - Step 5: Solve for x
x = 967,958,017,659,277,440/839,815,286.20 - Step 6: Final answer
x = 1,152,584,423.70
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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.