Finding the Fourth Proportional to 1,259,714,711.80, 1,889,572,067.70 and 769,938,686.20
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Solution
The fourth proportional to 1,259,714,711.80, 1,889,572,067.70 and 769,938,686.20 is: 1,154,908,029.30
Step by Step Solution
- Step 1: Write the proportion equation
1,259,714,711.80 : 1,889,572,067.70 = 769,938,686.20 : x - Step 2: Convert to fraction form
1,259,714,711.80/1,889,572,067.70 = 769,938,686.20/x - Step 3: Cross multiply
1,259,714,711.80x = 1,889,572,067.70 × 769,938,686.20 - Step 4: Simplify right side
1,259,714,711.80x = 1,454,854,635,285,155,584 - Step 5: Solve for x
x = 1,454,854,635,285,155,584/1,259,714,711.80 - Step 6: Final answer
x = 1,154,908,029.30
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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.