Finding the Fourth Proportional to 1,299,337,628.20, 1,949,006,442.30 and 644,389,739.80
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Solution
The fourth proportional to 1,299,337,628.20, 1,949,006,442.30 and 644,389,739.80 is: 966,584,609.70
Step by Step Solution
- Step 1: Write the proportion equation
1,299,337,628.20 : 1,949,006,442.30 = 644,389,739.80 : x - Step 2: Convert to fraction form
1,299,337,628.20/1,949,006,442.30 = 644,389,739.80/x - Step 3: Cross multiply
1,299,337,628.20x = 1,949,006,442.30 × 644,389,739.80 - Step 4: Simplify right side
1,299,337,628.20x = 1,255,919,754,222,220,544 - Step 5: Solve for x
x = 1,255,919,754,222,220,544/1,299,337,628.20 - Step 6: Final answer
x = 966,584,609.70
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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.