Finding the Fourth Proportional to 1,985,170,717.20, 2,977,756,075.80 and 511,307,677.20
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Solution
The fourth proportional to 1,985,170,717.20, 2,977,756,075.80 and 511,307,677.20 is: 766,961,515.80
Step by Step Solution
- Step 1: Write the proportion equation
1,985,170,717.20 : 2,977,756,075.80 = 511,307,677.20 : x - Step 2: Convert to fraction form
1,985,170,717.20/2,977,756,075.80 = 511,307,677.20/x - Step 3: Cross multiply
1,985,170,717.20x = 2,977,756,075.80 × 511,307,677.20 - Step 4: Simplify right side
1,985,170,717.20x = 1,522,549,542,385,485,312 - Step 5: Solve for x
x = 1,522,549,542,385,485,312/1,985,170,717.20 - Step 6: Final answer
x = 766,961,515.80
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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.