Finding the Fourth Proportional to 839,815,028.20, 1,259,722,542.30 and 379,768,205.80
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Solution
The fourth proportional to 839,815,028.20, 1,259,722,542.30 and 379,768,205.80 is: 569,652,308.70
Step by Step Solution
- Step 1: Write the proportion equation
839,815,028.20 : 1,259,722,542.30 = 379,768,205.80 : x - Step 2: Convert to fraction form
839,815,028.20/1,259,722,542.30 = 379,768,205.80/x - Step 3: Cross multiply
839,815,028.20x = 1,259,722,542.30 × 379,768,205.80 - Step 4: Simplify right side
839,815,028.20x = 478,402,569,695,085,632 - Step 5: Solve for x
x = 478,402,569,695,085,632/839,815,028.20 - Step 6: Final answer
x = 569,652,308.70
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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.