Finding the Fourth Proportional to 1,330,687,418.80, 1,996,031,128.20 and 986,313,650.80
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Solution
The fourth proportional to 1,330,687,418.80, 1,996,031,128.20 and 986,313,650.80 is: 1,479,470,476.20
Step by Step Solution
- Step 1: Write the proportion equation
1,330,687,418.80 : 1,996,031,128.20 = 986,313,650.80 : x - Step 2: Convert to fraction form
1,330,687,418.80/1,996,031,128.20 = 986,313,650.80/x - Step 3: Cross multiply
1,330,687,418.80x = 1,996,031,128.20 × 986,313,650.80 - Step 4: Simplify right side
1,330,687,418.80x = 1,968,712,749,165,384,704 - Step 5: Solve for x
x = 1,968,712,749,165,384,704/1,330,687,418.80 - Step 6: Final answer
x = 1,479,470,476.20
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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.