Finding the Fourth Proportional to 1,259,961,773.28, 1,889,888,815.96 and 430,989,541.80
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Solution
The fourth proportional to 1,259,961,773.28, 1,889,888,815.96 and 430,989,541.80 is: 646,465,894.54
Step by Step Solution
- Step 1: Write the proportion equation
1,259,961,773.28 : 1,889,888,815.96 = 430,989,541.80 : x - Step 2: Convert to fraction form
1,259,961,773.28/1,889,888,815.96 = 430,989,541.80/x - Step 3: Cross multiply
1,259,961,773.28x = 1,889,888,815.96 × 430,989,541.80 - Step 4: Simplify right side
1,259,961,773.28x = 814,522,314,843,544,960 - Step 5: Solve for x
x = 814,522,314,843,544,960/1,259,961,773.28 - Step 6: Final answer
x = 646,465,894.54
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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.