Finding the Fourth Proportional to 1,328,603,987.80, 1,992,905,981.70 and 454,914,983.80
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Solution
The fourth proportional to 1,328,603,987.80, 1,992,905,981.70 and 454,914,983.80 is: 682,372,475.70
Step by Step Solution
- Step 1: Write the proportion equation
1,328,603,987.80 : 1,992,905,981.70 = 454,914,983.80 : x - Step 2: Convert to fraction form
1,328,603,987.80/1,992,905,981.70 = 454,914,983.80/x - Step 3: Cross multiply
1,328,603,987.80x = 1,992,905,981.70 × 454,914,983.80 - Step 4: Simplify right side
1,328,603,987.80x = 906,602,792,379,978,624 - Step 5: Solve for x
x = 906,602,792,379,978,624/1,328,603,987.80 - Step 6: Final answer
x = 682,372,475.70
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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.