Finding the Fourth Proportional to 1,286,588.70, 1,929,390.30 and 433,431.09
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Solution
The fourth proportional to 1,286,588.70, 1,929,390.30 and 433,431.09 is: 649,980.64
Step by Step Solution
- Step 1: Write the proportion equation
1,286,588.70 : 1,929,390.30 = 433,431.09 : x - Step 2: Convert to fraction form
1,286,588.70/1,929,390.30 = 433,431.09/x - Step 3: Cross multiply
1,286,588.70x = 1,929,390.30 × 433,431.09 - Step 4: Simplify right side
1,286,588.70x = 836,257,740,764.43 - Step 5: Solve for x
x = 836,257,740,764.43/1,286,588.70 - Step 6: Final answer
x = 649,980.64
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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.