Finding the Fourth Proportional to 1,259,714,217.80, 1,889,571,326.70 and 339,683,558.60
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Solution
The fourth proportional to 1,259,714,217.80, 1,889,571,326.70 and 339,683,558.60 is: 509,525,337.90
Step by Step Solution
- Step 1: Write the proportion equation
1,259,714,217.80 : 1,889,571,326.70 = 339,683,558.60 : x - Step 2: Convert to fraction form
1,259,714,217.80/1,889,571,326.70 = 339,683,558.60/x - Step 3: Cross multiply
1,259,714,217.80x = 1,889,571,326.70 × 339,683,558.60 - Step 4: Simplify right side
1,259,714,217.80x = 641,856,312,481,979,264 - Step 5: Solve for x
x = 641,856,312,481,979,264/1,259,714,217.80 - Step 6: Final answer
x = 509,525,337.90
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Double scale
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Similar ratio
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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.